Require TrustedURL in form.action and .formAction

Bug: 739170
Change-Id: I50691fcab4f13fdaee47a4b4750ef7d3b4544848
Reviewed-on: https://chromium-review.googlesource.com/c/1397613
Commit-Queue: Jakub Vrana <jakubvrana@google.com>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621676}
diff --git a/trusted-types/block-string-assignment-to-Element-setAttribute.tentative.html b/trusted-types/block-string-assignment-to-Element-setAttribute.tentative.html
index 9bda8d9..639bbf1 100644
--- a/trusted-types/block-string-assignment-to-Element-setAttribute.tentative.html
+++ b/trusted-types/block-string-assignment-to-Element-setAttribute.tentative.html
@@ -16,9 +16,12 @@
     [ 'a', 'href' ],
     [ 'area', 'href' ],
     [ 'base', 'href' ],
+    [ 'button', 'formAction' ],
+    [ 'form', 'action' ],
     [ 'frame', 'src' ],
     [ 'iframe', 'src' ],
     [ 'img', 'src' ],
+    [ 'input', 'formAction' ],
     [ 'input', 'src' ],
     [ 'link', 'href' ],
     [ 'video', 'src' ],
diff --git a/trusted-types/block-string-assignment-to-HTMLElement-generic.tentative.html b/trusted-types/block-string-assignment-to-HTMLElement-generic.tentative.html
index 0eef00b..fd89bb3 100644
--- a/trusted-types/block-string-assignment-to-HTMLElement-generic.tentative.html
+++ b/trusted-types/block-string-assignment-to-HTMLElement-generic.tentative.html
@@ -15,9 +15,12 @@
     [ 'a', 'href' ],
     [ 'area', 'href' ],
     [ 'base', 'href' ],
+    [ 'button', 'formAction' ],
+    [ 'form', 'action' ],
     [ 'frame', 'src' ],
     [ 'iframe', 'src' ],
     [ 'img', 'src' ],
+    [ 'input', 'formAction' ],
     [ 'input', 'src' ],
     [ 'link', 'href' ],
     [ 'video', 'src' ],