[layout] Disable break-propagation for layout contained elements.

contain-layout-breaks-002.html was incorrect in that it was inserting a
unnecessary break.

Fixed: 868704
Change-Id: I077901143e3d196d34e1e18e2388c860b59f4ebd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3682222
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1010754}
diff --git a/css/css-contain/contain-layout-breaks-002.html b/css/css-contain/contain-layout-breaks-002.html
index cf23ad7..7b5c17a 100644
--- a/css/css-contain/contain-layout-breaks-002.html
+++ b/css/css-contain/contain-layout-breaks-002.html
@@ -40,7 +40,7 @@
     }
   </style>
 
-  <p>Test passes if there is a) a blue square below a yellow square and b) an orange square on the righthand side of the yellow square.
+  <p>Test passes if there is a) a blue square below a yellow square and b) an orange square below a blue square.
 
   <article>
 
diff --git a/css/css-contain/reference/contain-layout-breaks-002-ref.html b/css/css-contain/reference/contain-layout-breaks-002-ref.html
index c68bee1..72a3bef 100644
--- a/css/css-contain/reference/contain-layout-breaks-002-ref.html
+++ b/css/css-contain/reference/contain-layout-breaks-002-ref.html
@@ -18,8 +18,13 @@
     }
   </style>
 
-  <p>Test passes if there is a) a blue square below a yellow square and b) an orange square on the righthand side of the yellow square.
+  <p>Test passes if there is a) a blue square below a yellow square and b) an orange square below a blue square.
 
-  <div><img src="../support/swatch-yellow.png" width="100" height="100" alt="Image download support must be enabled"><br><img src="../support/swatch-blue.png" width="100" height="100" alt="Image download support must be enabled"></div>
+  <div>
+    <img src="../support/swatch-yellow.png" width="100" height="100" alt="Image download support must be enabled">
+    <br>
+    <img src="../support/swatch-blue.png" width="100" height="100" alt="Image download support must be enabled">
+    <br>
+    <img src="../support/swatch-orange.png" width="100" height="100" alt="Image download support must be enabled">
+  </div>
 
-  <div><img src="../support/swatch-orange.png" width="100" height="100" alt="Image download support must be enabled"></div>