Revert "[block-in-inline] Change the runtime flag to stable"

This reverts commit 4a76c96d2a4021257e691058c1fe1fb60d9d8327.

Reason for revert: crbug.com/1306628

The plan is to disable in M100 but enable in M101. To do
this, disable at trunk, then merge it to M100 and re-enable
only in trunk.

`WallpaperSubpageBrowserTest.LoadsCollectionsGrid` was
temporarily disabled as it relies on LayoutNGBlockInInline
(see `offsetHeight` in the "Known Behavior Changes" section of
the design doc.)

Original change's description:
> [block-in-inline] Change the runtime flag to stable
>
> Includes rebaselines of known changes that were not enabled
> when the flag was changed to "test" in r961524
> crrev.com/c/2956771. Please see the "Known Behavior Changes"
> section of the design doc:
> https://docs.google.com/document/d/15kgdIHhb9EVNup6Ir5NWwJxpzY5GH0ED7Ld3iMW3HlA/edit?pli=1#bookmark=id.a9j03i2hzxxf
>
> Bug: 716930
> Change-Id: Ic8d9134c592ebb8e88efc16aa636aed32a975ffc
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3398315
> Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
> Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
> Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
> Commit-Queue: Koji Ishii <kojii@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#967823}

Bug: 1306628, 716930
Change-Id: I7a87831361c5bac6f23b609ef29a4ab0b1345806
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3526799
Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Reviewed-by: Jeffrey Young <cowmoo@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/main@{#981678}
diff --git a/ash/webui/personalization_app/test/personalization_app_browsertest.js b/ash/webui/personalization_app/test/personalization_app_browsertest.js
index caef8d9..27d3b272 100644
--- a/ash/webui/personalization_app/test/personalization_app_browsertest.js
+++ b/ash/webui/personalization_app/test/personalization_app_browsertest.js
@@ -167,7 +167,9 @@
   testDone();
 });
 
-TEST_F('WallpaperSubpageBrowserTest', 'LoadsCollectionsGrid', () => {
+// TODO(crbug.com/1306628): Disable this test while LayoutNGBlockInInline is
+// off. This should be reenabled before the M101 branch point.
+TEST_F('WallpaperSubpageBrowserTest', 'DISABLED_LoadsCollectionsGrid', () => {
   const router = document.querySelector('personalization-router');
   assertTrue(!!router, 'personalization-router should be top level element');
 
diff --git a/content/test/data/accessibility/aria/aria-owns-included-in-tree-expected-auralinux.txt b/content/test/data/accessibility/aria/aria-owns-included-in-tree-expected-auralinux.txt
index 552c40d1f2..0a6872f 100644
--- a/content/test/data/accessibility/aria/aria-owns-included-in-tree-expected-auralinux.txt
+++ b/content/test/data/accessibility/aria/aria-owns-included-in-tree-expected-auralinux.txt
@@ -1,22 +1,21 @@
 [document web]
+++[separator] name='Control: elements that are not in tree' horizontal
 ++[section]
-++++[separator] name='Control: elements that are not in tree' horizontal
 ++++[section]
 ++++++[section]
-++++++++[section]
-++++++++++[entry] selectable-text
-++++[separator] name='An aria-owned element is always in tree' horizontal
-++++[panel]
-++++++[push button] name='button-in-owned-tree'
-++++[separator] name='Element with aria-owns is always in tree' horizontal
+++++++++[entry] selectable-text
+++[separator] name='An aria-owned element is always in tree' horizontal
+++[panel]
+++++[push button] name='button-in-owned-tree'
+++[separator] name='Element with aria-owns is always in tree' horizontal
+++[section]
+++++[entry] selectable-text
+++[separator] name='Owning an element with unincluded ancestors serializes cleanly' horizontal
+++[panel]
+++++[check box] checkable:true
+++[separator] name='All the above in one' horizontal
+++[section]
 ++++[section]
-++++++[entry] selectable-text
-++++[separator] name='Owning an element with unincluded ancestors serializes cleanly' horizontal
-++++[panel]
-++++++[check box] checkable:true
-++++[separator] name='All the above in one' horizontal
+++++++[static] name='xyz'
 ++++[section]
-++++++[section]
-++++++++[static] name='xyz'
-++++++[section]
-++++++++[slider] horizontal current=50.000000 minimum=0.000000 maximum=100.000000
+++++++[slider] horizontal current=50.000000 minimum=0.000000 maximum=100.000000
diff --git a/content/test/data/accessibility/aria/aria-owns-included-in-tree-expected-blink.txt b/content/test/data/accessibility/aria/aria-owns-included-in-tree-expected-blink.txt
index a768635..86297cd 100644
--- a/content/test/data/accessibility/aria/aria-owns-included-in-tree-expected-blink.txt
+++ b/content/test/data/accessibility/aria/aria-owns-included-in-tree-expected-blink.txt
@@ -1,6 +1,6 @@
 rootWebArea
 ++genericContainer ignored
-++++genericContainer
+++++genericContainer ignored
 ++++++genericContainer ignored
 ++++++++splitter horizontal name='Control: elements that are not in tree'
 ++++++++genericContainer ignored
diff --git a/content/test/data/accessibility/aria/label-with-selected-option-expected-blink.txt b/content/test/data/accessibility/aria/label-with-selected-option-expected-blink.txt
index 170e69f..f24d099 100644
--- a/content/test/data/accessibility/aria/label-with-selected-option-expected-blink.txt
+++ b/content/test/data/accessibility/aria/label-with-selected-option-expected-blink.txt
@@ -1,7 +1,7 @@
 rootWebArea
 ++genericContainer ignored
 ++++genericContainer ignored
-++++++genericContainer
+++++++genericContainer ignored
 ++++++++checkBox name='Test 1: Flash the screen 2 times.' checkedState=false
 ++++++++labelText
 ++++++++++staticText name='Test 1: Flash the screen'
@@ -18,7 +18,7 @@
 ++++++++++++++++inlineTextBox name='3'
 ++++++++++staticText name='times.'
 ++++++++++++inlineTextBox name='times.'
-++++++genericContainer
+++++++genericContainer ignored
 ++++++++checkBox name='Test 2: Flash the screen 2 times.' checkedState=false
 ++++++++labelText
 ++++++++++staticText name='Test 2: Flash the screen'
@@ -37,7 +37,7 @@
 ++++++++++++++++++inlineTextBox name='3'
 ++++++++++staticText name='times.'
 ++++++++++++inlineTextBox name='times.'
-++++++genericContainer
+++++++genericContainer ignored
 ++++++++checkBox name='Test 3: Flash the screen two times.' checkedState=false
 ++++++++labelText
 ++++++++++staticText name='Test 3: Flash the screen'
@@ -54,7 +54,7 @@
 ++++++++++++++++inlineTextBox name='3'
 ++++++++++staticText name='times.'
 ++++++++++++inlineTextBox name='times.'
-++++++genericContainer
+++++++genericContainer ignored
 ++++++++checkBox name='Test 4: Flash the screen two times.' checkedState=false
 ++++++++labelText
 ++++++++++staticText name='Test 4: Flash the screen'
@@ -73,7 +73,7 @@
 ++++++++++++++++++inlineTextBox name='3'
 ++++++++++staticText name='times.'
 ++++++++++++inlineTextBox name='times.'
-++++++genericContainer
+++++++genericContainer ignored
 ++++++++checkBox name='Test 5: Flash the screen two times.' checkedState=false
 ++++++++labelText
 ++++++++++staticText name='Test 5: Flash the screen'
diff --git a/content/test/data/accessibility/css/before-after-block-expected-blink.txt b/content/test/data/accessibility/css/before-after-block-expected-blink.txt
index 8cb1b0a2..344d34c 100644
--- a/content/test/data/accessibility/css/before-after-block-expected-blink.txt
+++ b/content/test/data/accessibility/css/before-after-block-expected-blink.txt
@@ -1,7 +1,7 @@
 rootWebArea htmlTag='#document'
 ++genericContainer ignored htmlTag='html'
 ++++genericContainer ignored htmlTag='body'
-++++++genericContainer htmlTag='div'
+++++++genericContainer ignored htmlTag='div'
 ++++++++staticText name='A'
 ++++++++++inlineTextBox name='A'
 ++++++++genericContainer ignored htmlTag='b'
diff --git a/content/test/data/accessibility/css/before-after-code-expected-android-external.txt b/content/test/data/accessibility/css/before-after-code-expected-android-external.txt
index f1ca5d2f..0906446 100644
--- a/content/test/data/accessibility/css/before-after-code-expected-android-external.txt
+++ b/content/test/data/accessibility/css/before-after-code-expected-android-external.txt
@@ -1,4 +1,24 @@
 WebView focusable focused scrollable actions:[CLEAR_FOCUS, AX_FOCUS] bundle:[chromeRole="rootWebArea"]
 ++TextView text:"start" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="genericContainer"]
-++TextView text:"text with [:before] and [:after] content, then abold element with a [block] before content then a italicelement with a [block] after content" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="genericContainer"]
+++TextView text:"text with " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"[" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:":before" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"]" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:" and " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"[" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:":after" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"]" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:" content, then a" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"bold" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:" element with a " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"[" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"block" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"]" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:" before content then a " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"italic" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"element with a " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"[" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"block" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:"]" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++TextView text:" after content" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
 ++TextView text:"end" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="genericContainer"]
\ No newline at end of file
diff --git a/content/test/data/accessibility/html/a-nested-structure-expected-android-external.txt b/content/test/data/accessibility/html/a-nested-structure-expected-android-external.txt
index 6d58949..b7d1548 100644
--- a/content/test/data/accessibility/html/a-nested-structure-expected-android-external.txt
+++ b/content/test/data/accessibility/html/a-nested-structure-expected-android-external.txt
@@ -1,14 +1,13 @@
 WebView focusable focused scrollable actions:[CLEAR_FOCUS, AX_FOCUS] bundle:[chromeRole="rootWebArea"]
-++View actions:[AX_FOCUS] bundle:[chromeRole="genericContainer"]
-++++View text:"null" contentDescription:"Header 1 List element 1 List element 2 List element 3" clickable focusable actions:[FOCUS, CLICK, AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="link", clickableScore="300", roleDescription="link", targetUrl="http://www.foobar.com/"]
-++++++TextView text:"Header 1" CollectionItemInfo:[heading, rowIndex=0, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="heading", clickableScore="100", roleDescription="heading 1"]
-++++++ListView CollectionInfo:[rows=3, cols=0] actions:[AX_FOCUS] bundle:[chromeRole="list", clickableScore="100"]
-++++++++View CollectionItemInfo:[rowIndex=0, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS] bundle:[chromeRole="listItem", clickableScore="100"]
-++++++++++View text:"• " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="listMarker", clickableScore="100"]
-++++++++++TextView text:"List element 1" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
-++++++++View CollectionItemInfo:[rowIndex=1, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS] bundle:[chromeRole="listItem", clickableScore="100"]
-++++++++++View text:"• " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="listMarker", clickableScore="100"]
-++++++++++TextView text:"List element 2" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
-++++++++View CollectionItemInfo:[rowIndex=2, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS] bundle:[chromeRole="listItem", clickableScore="100"]
-++++++++++View text:"• " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="listMarker", clickableScore="100"]
-++++++++++TextView text:"List element 3" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
\ No newline at end of file
+++View text:"null" contentDescription:"Header 1 List element 1 List element 2 List element 3" clickable focusable actions:[FOCUS, CLICK, AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="link", clickableScore="300", roleDescription="link", targetUrl="http://www.foobar.com/"]
+++++TextView text:"Header 1" CollectionItemInfo:[heading, rowIndex=0, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="heading", clickableScore="100", roleDescription="heading 1"]
+++++ListView CollectionInfo:[rows=3, cols=0] actions:[AX_FOCUS] bundle:[chromeRole="list", clickableScore="100"]
+++++++View CollectionItemInfo:[rowIndex=0, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS] bundle:[chromeRole="listItem", clickableScore="100"]
+++++++++View text:"• " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="listMarker", clickableScore="100"]
+++++++++TextView text:"List element 1" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++++++View CollectionItemInfo:[rowIndex=1, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS] bundle:[chromeRole="listItem", clickableScore="100"]
+++++++++View text:"• " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="listMarker", clickableScore="100"]
+++++++++TextView text:"List element 2" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++++++View CollectionItemInfo:[rowIndex=2, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS] bundle:[chromeRole="listItem", clickableScore="100"]
+++++++++View text:"• " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="listMarker", clickableScore="100"]
+++++++++TextView text:"List element 3" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
\ No newline at end of file
diff --git a/content/test/data/accessibility/html/a-nested-structure-expected-android.txt b/content/test/data/accessibility/html/a-nested-structure-expected-android.txt
index 1d08501..fac36600 100644
--- a/content/test/data/accessibility/html/a-nested-structure-expected-android.txt
+++ b/content/test/data/accessibility/html/a-nested-structure-expected-android.txt
@@ -1,14 +1,13 @@
 android.webkit.WebView focusable focused scrollable
-++android.view.View
-++++android.view.View role_description='link' clickable focusable link name='Header 1 List element 1 List element 2 List element 3'
-++++++android.widget.TextView role_description='heading 1' heading name='Header 1'
-++++++android.widget.ListView collection item_count=3 row_count=3
-++++++++android.view.View collection_item
-++++++++++android.view.View name='%E2%80%A2 '
-++++++++++android.widget.TextView name='List element 1'
-++++++++android.view.View collection_item item_index=1 row_index=1
-++++++++++android.view.View name='%E2%80%A2 '
-++++++++++android.widget.TextView name='List element 2'
-++++++++android.view.View collection_item item_index=2 row_index=2
-++++++++++android.view.View name='%E2%80%A2 '
-++++++++++android.widget.TextView name='List element 3'
\ No newline at end of file
+++android.view.View role_description='link' clickable focusable link name='Header 1 List element 1 List element 2 List element 3'
+++++android.widget.TextView role_description='heading 1' heading name='Header 1'
+++++android.widget.ListView collection item_count=3 row_count=3
+++++++android.view.View collection_item
+++++++++android.view.View name='%E2%80%A2 '
+++++++++android.widget.TextView name='List element 1'
+++++++android.view.View collection_item item_index=1 row_index=1
+++++++++android.view.View name='%E2%80%A2 '
+++++++++android.widget.TextView name='List element 2'
+++++++android.view.View collection_item item_index=2 row_index=2
+++++++++android.view.View name='%E2%80%A2 '
+++++++++android.widget.TextView name='List element 3'
\ No newline at end of file
diff --git a/content/test/data/accessibility/html/a-nested-structure-expected-auralinux.txt b/content/test/data/accessibility/html/a-nested-structure-expected-auralinux.txt
index 2bb42c14..b34baeb3 100644
--- a/content/test/data/accessibility/html/a-nested-structure-expected-auralinux.txt
+++ b/content/test/data/accessibility/html/a-nested-structure-expected-auralinux.txt
@@ -1,15 +1,14 @@
 [document web]
-++[section]
-++++[link] name='Header 1 List element 1 List element 2 List element 3'
-++++++[heading] name='Header 1'
-++++++++[static] name='Header 1'
-++++++[list]
-++++++++[list item]
-++++++++++[static] name='%E2%80%A2 '
-++++++++++[static] name='List element 1'
-++++++++[list item]
-++++++++++[static] name='%E2%80%A2 '
-++++++++++[static] name='List element 2'
-++++++++[list item]
-++++++++++[static] name='%E2%80%A2 '
-++++++++++[static] name='List element 3'
\ No newline at end of file
+++[link] name='Header 1 List element 1 List element 2 List element 3'
+++++[heading] name='Header 1'
+++++++[static] name='Header 1'
+++++[list]
+++++++[list item]
+++++++++[static] name='%E2%80%A2 '
+++++++++[static] name='List element 1'
+++++++[list item]
+++++++++[static] name='%E2%80%A2 '
+++++++++[static] name='List element 2'
+++++++[list item]
+++++++++[static] name='%E2%80%A2 '
+++++++++[static] name='List element 3'
\ No newline at end of file
diff --git a/content/test/data/accessibility/html/a-nested-structure-expected-blink.txt b/content/test/data/accessibility/html/a-nested-structure-expected-blink.txt
index 579028a..163ea5e 100644
--- a/content/test/data/accessibility/html/a-nested-structure-expected-blink.txt
+++ b/content/test/data/accessibility/html/a-nested-structure-expected-blink.txt
@@ -1,6 +1,6 @@
 rootWebArea
 ++genericContainer ignored
-++++genericContainer
+++++genericContainer ignored
 ++++++link name='Header 1 List element 1 List element 2 List element 3'
 ++++++++heading name='Header 1' hierarchicalLevel=1
 ++++++++++staticText name='Header 1'
diff --git a/content/test/data/accessibility/html/continuations-expected-android-external.txt b/content/test/data/accessibility/html/continuations-expected-android-external.txt
index 433091c..90be0588 100644
--- a/content/test/data/accessibility/html/continuations-expected-android-external.txt
+++ b/content/test/data/accessibility/html/continuations-expected-android-external.txt
@@ -15,8 +15,7 @@
 ++++++++TextView text:"After" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
 ++View text:"Group 4" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="group"]
 ++++TextView text:"Before" viewIdResName:"before" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="genericContainer"]
-++++View actions:[AX_FOCUS] bundle:[chromeRole="genericContainer"]
-++++++TextView text:"After" viewIdResName:"after" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="paragraph"]
+++++TextView text:"After" viewIdResName:"after" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="paragraph"]
 ++View text:"Group 5" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="group"]
 ++++TextView text:"Italic only " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
 ++++TextView text:"italic and bold" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
diff --git a/content/test/data/accessibility/html/continuations-expected-auralinux.txt b/content/test/data/accessibility/html/continuations-expected-auralinux.txt
index 0e4e2cf3..23dcfc44 100644
--- a/content/test/data/accessibility/html/continuations-expected-auralinux.txt
+++ b/content/test/data/accessibility/html/continuations-expected-auralinux.txt
@@ -21,9 +21,8 @@
 ++[panel] name='Group 4'
 ++++[section]
 ++++++[static] name='Before'
-++++[section]
-++++++[paragraph]
-++++++++[static] name='After'
+++++[paragraph]
+++++++[static] name='After'
 ++[panel] name='Group 5'
 ++++[static] name='Italic only '
 ++++[static] name='italic and bold'
diff --git a/content/test/data/accessibility/html/continuations-expected-blink.txt b/content/test/data/accessibility/html/continuations-expected-blink.txt
index af1441e..96dcbe8 100644
--- a/content/test/data/accessibility/html/continuations-expected-blink.txt
+++ b/content/test/data/accessibility/html/continuations-expected-blink.txt
@@ -32,7 +32,7 @@
 ++++++++genericContainer display='block' isLineBreakingObject=true
 ++++++++++staticText display='block' name='Before'
 ++++++++++++inlineTextBox display='block' name='Before'
-++++++++genericContainer display='block' isLineBreakingObject=true
+++++++++genericContainer ignored isLineBreakingObject=true
 ++++++++++paragraph display='block' isLineBreakingObject=true
 ++++++++++++staticText display='block' name='After'
 ++++++++++++++inlineTextBox display='block' name='After'
diff --git a/content/test/data/accessibility/html/continuations-parser-splits-markup-expected-blink.txt b/content/test/data/accessibility/html/continuations-parser-splits-markup-expected-blink.txt
index 5f023da..6829cda 100644
--- a/content/test/data/accessibility/html/continuations-parser-splits-markup-expected-blink.txt
+++ b/content/test/data/accessibility/html/continuations-parser-splits-markup-expected-blink.txt
@@ -1,7 +1,7 @@
 rootWebArea isLineBreakingObject=true
 ++genericContainer ignored isLineBreakingObject=true
 ++++genericContainer ignored isLineBreakingObject=true
-++++++genericContainer display='block' isLineBreakingObject=true
+++++++genericContainer ignored isLineBreakingObject=true
 ++++++++genericContainer className='copied-element' display='inline'
 ++++++++++genericContainer className='before' display='block' isLineBreakingObject=true
 ++++++++++++staticText display='block' name='Before'
diff --git a/content/test/data/accessibility/html/custom-element-nested-slots-expected-auralinux.txt b/content/test/data/accessibility/html/custom-element-nested-slots-expected-auralinux.txt
index 855e286f..f5af5c2 100644
--- a/content/test/data/accessibility/html/custom-element-nested-slots-expected-auralinux.txt
+++ b/content/test/data/accessibility/html/custom-element-nested-slots-expected-auralinux.txt
@@ -1,4 +1,3 @@
 [document web] tag:#document
-++[section] tag:body
-++++[paragraph] tag:p
-++++++[static] name='Slot contents'
\ No newline at end of file
+++[paragraph] tag:p
+++++[static] name='Slot contents'
diff --git a/content/test/data/accessibility/html/custom-element-nested-slots-expected-blink.txt b/content/test/data/accessibility/html/custom-element-nested-slots-expected-blink.txt
index f094fb6..654c3422f 100644
--- a/content/test/data/accessibility/html/custom-element-nested-slots-expected-blink.txt
+++ b/content/test/data/accessibility/html/custom-element-nested-slots-expected-blink.txt
@@ -1,6 +1,6 @@
 rootWebArea htmlTag='#document'
 ++genericContainer ignored htmlTag='html'
-++++genericContainer htmlTag='body'
+++++genericContainer ignored htmlTag='body'
 ++++++genericContainer ignored htmlTag='my-element'
 ++++++++genericContainer ignored className='div-inside-template' htmlTag='div'
 ++++++++++genericContainer ignored className='outer' htmlTag='slot'
diff --git a/content/test/data/accessibility/html/custom-element-remove-nodes-expected-blink.txt b/content/test/data/accessibility/html/custom-element-remove-nodes-expected-blink.txt
index 4312912..80e69ed 100644
--- a/content/test/data/accessibility/html/custom-element-remove-nodes-expected-blink.txt
+++ b/content/test/data/accessibility/html/custom-element-remove-nodes-expected-blink.txt
@@ -1,6 +1,6 @@
 rootWebArea htmlTag='#document' name='done'
 ++genericContainer ignored htmlTag='html'
-++++genericContainer htmlTag='body'
+++++genericContainer ignored htmlTag='body'
 ++++++genericContainer className='dt1' htmlTag='x-details'
 ++++++++genericContainer ignored htmlTag='slot'
 ++++++++++genericContainer description='Details' htmlTag='summary' descriptionFrom=summary
diff --git a/content/test/data/accessibility/html/custom-element-with-aria-owns-inside-expected-blink.txt b/content/test/data/accessibility/html/custom-element-with-aria-owns-inside-expected-blink.txt
index 2251051..d22c1bf3 100644
--- a/content/test/data/accessibility/html/custom-element-with-aria-owns-inside-expected-blink.txt
+++ b/content/test/data/accessibility/html/custom-element-with-aria-owns-inside-expected-blink.txt
@@ -1,6 +1,6 @@
 rootWebArea
 ++genericContainer ignored
-++++genericContainer
+++++genericContainer ignored
 ++++++group
 ++++++++docEndnotes
 ++++++++++docEndnote
diff --git a/content/test/data/accessibility/html/custom-element-with-aria-owns-inside-slot-expected-blink.txt b/content/test/data/accessibility/html/custom-element-with-aria-owns-inside-slot-expected-blink.txt
index 9a776199..0e70391a 100644
--- a/content/test/data/accessibility/html/custom-element-with-aria-owns-inside-slot-expected-blink.txt
+++ b/content/test/data/accessibility/html/custom-element-with-aria-owns-inside-slot-expected-blink.txt
@@ -1,6 +1,6 @@
 rootWebArea
 ++genericContainer ignored
-++++genericContainer
+++++genericContainer ignored
 ++++++group
 ++++++++docEndnotes
 ++++++++++docEndnote
diff --git a/content/test/data/accessibility/html/map-any-contents-expected-android-external.txt b/content/test/data/accessibility/html/map-any-contents-expected-android-external.txt
index 8e046a3..5a3cb517 100644
--- a/content/test/data/accessibility/html/map-any-contents-expected-android-external.txt
+++ b/content/test/data/accessibility/html/map-any-contents-expected-android-external.txt
@@ -1,11 +1,10 @@
 WebView focusable focused scrollable actions:[CLEAR_FOCUS, AX_FOCUS] bundle:[chromeRole="rootWebArea", hasImage="true"]
-++View actions:[AX_FOCUS] bundle:[chromeRole="genericContainer", hasImage="true"]
-++++Image text:"pipe" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="image", hasImage="true", roleDescription="graphic", targetUrl="file:///storage/emulated/0/chromium_tests_root/content/test/data/accessibility/html/pipe.jpg"]
-++++++TextView text:"Headings are allowed in a map" CollectionItemInfo:[heading, rowIndex=0, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="heading", roleDescription="heading 1"]
-++++++View text:"null" contentDescription:"pipe1" clickable focusable actions:[FOCUS, CLICK, AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="link", clickableScore="300", roleDescription="link", targetUrl="file:///storage/emulated/0/chromium_tests_root/content/test/data/accessibility/html/fake.htm"]
-++++++View actions:[AX_FOCUS] bundle:[chromeRole="paragraph"]
-++++++++TextView text:"So are " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
-++++++++View text:"other elements" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="mark", roleDescription="highlight"]
-++++++++TextView text:"!" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
-++++++TextView text:"pipe2" clickable actions:[CLICK, AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText", clickableScore="200"]
-++++++Button text:"Even a button" clickable focusable actions:[FOCUS, CLICK, AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="button", clickableScore="300", roleDescription="button"]
\ No newline at end of file
+++Image text:"pipe" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="image", hasImage="true", roleDescription="graphic", targetUrl="file:///storage/emulated/0/chromium_tests_root/content/test/data/accessibility/html/pipe.jpg"]
+++++TextView text:"Headings are allowed in a map" CollectionItemInfo:[heading, rowIndex=0, rowSpan=0, colIndex=0, colSpan=0] actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="heading", roleDescription="heading 1"]
+++++View text:"null" contentDescription:"pipe1" clickable focusable actions:[FOCUS, CLICK, AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="link", clickableScore="300", roleDescription="link", targetUrl="file:///storage/emulated/0/chromium_tests_root/content/test/data/accessibility/html/fake.htm"]
+++++View actions:[AX_FOCUS] bundle:[chromeRole="paragraph"]
+++++++TextView text:"So are " actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++++++View text:"other elements" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="mark", roleDescription="highlight"]
+++++++TextView text:"!" actions:[AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText"]
+++++TextView text:"pipe2" clickable actions:[CLICK, AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="staticText", clickableScore="200"]
+++++Button text:"Even a button" clickable focusable actions:[FOCUS, CLICK, AX_FOCUS, NEXT, PREVIOUS] bundle:[chromeRole="button", clickableScore="300", roleDescription="button"]
\ No newline at end of file
diff --git a/content/test/data/accessibility/html/map-any-contents-expected-auralinux.txt b/content/test/data/accessibility/html/map-any-contents-expected-auralinux.txt
index 59d1f39d..a5de671 100644
--- a/content/test/data/accessibility/html/map-any-contents-expected-auralinux.txt
+++ b/content/test/data/accessibility/html/map-any-contents-expected-auralinux.txt
@@ -1,13 +1,12 @@
 [document web]
-++[section]
-++++[image map] name='pipe'
-++++++[heading] name='Headings are allowed in a map'
-++++++++[static] name='Headings are allowed in a map'
-++++++[link] name='pipe1'
-++++++[paragraph]
-++++++++[static] name='So are '
-++++++++[static]
-++++++++++[static] name='other elements'
-++++++++[static] name='!'
-++++++[static] name='pipe2'
-++++++[push button] name='Even a button'
\ No newline at end of file
+++[image map] name='pipe'
+++++[heading] name='Headings are allowed in a map'
+++++++[static] name='Headings are allowed in a map'
+++++[link] name='pipe1'
+++++[paragraph]
+++++++[static] name='So are '
+++++++[static]
+++++++++[static] name='other elements'
+++++++[static] name='!'
+++++[static] name='pipe2'
+++++[push button] name='Even a button'
\ No newline at end of file
diff --git a/content/test/data/accessibility/html/map-any-contents-expected-blink.txt b/content/test/data/accessibility/html/map-any-contents-expected-blink.txt
index f88a81d..b4d6e31 100644
--- a/content/test/data/accessibility/html/map-any-contents-expected-blink.txt
+++ b/content/test/data/accessibility/html/map-any-contents-expected-blink.txt
@@ -1,6 +1,6 @@
 rootWebArea
 ++genericContainer ignored
-++++genericContainer
+++++genericContainer ignored
 ++++++image name='pipe'
 ++++++++heading name='Headings are allowed in a map'
 ++++++++++staticText name='Headings are allowed in a map'
diff --git a/third_party/blink/common/features.cc b/third_party/blink/common/features.cc
index e8c1c486..1cee901 100644
--- a/third_party/blink/common/features.cc
+++ b/third_party/blink/common/features.cc
@@ -146,10 +146,6 @@
 const base::Feature kPath2DPaintCache{"Path2DPaintCache",
                                       base::FEATURE_DISABLED_BY_DEFAULT};
 
-// Enable by default. This feature is for a kill switch.
-const base::Feature kLayoutNGBlockInInline{"LayoutNGBlockInInline",
-                                           base::FEATURE_ENABLED_BY_DEFAULT};
-
 const base::Feature kMixedContentAutoupgrade{"AutoupgradeMixedContent",
                                              base::FEATURE_ENABLED_BY_DEFAULT};
 
diff --git a/third_party/blink/public/common/features.h b/third_party/blink/public/common/features.h
index 16aa2edf..5dd9fd0 100644
--- a/third_party/blink/public/common/features.h
+++ b/third_party/blink/public/common/features.h
@@ -50,7 +50,6 @@
 BLINK_COMMON_EXPORT extern const base::Feature kDeferredFontShaping;
 BLINK_COMMON_EXPORT extern const base::Feature kEditingNG;
 BLINK_COMMON_EXPORT extern const base::Feature kLayoutNG;
-BLINK_COMMON_EXPORT extern const base::Feature kLayoutNGBlockInInline;
 BLINK_COMMON_EXPORT extern const base::Feature kMixedContentAutoupgrade;
 BLINK_COMMON_EXPORT extern const base::Feature kNavigationPredictor;
 BLINK_COMMON_EXPORT extern const base::Feature kAnchorElementInteraction;
diff --git a/third_party/blink/renderer/platform/runtime_enabled_features.json5 b/third_party/blink/renderer/platform/runtime_enabled_features.json5
index 763498f5..8dc8751 100644
--- a/third_party/blink/renderer/platform/runtime_enabled_features.json5
+++ b/third_party/blink/renderer/platform/runtime_enabled_features.json5
@@ -1329,7 +1329,7 @@
     {
       name: "LayoutNGBlockInInline",
       depends_on: ["LayoutNG"],
-      status: "stable",
+      status: "test",
     },
     {
       // Block fragmentation support in the flex layout algorithm.