Bug 1521088 - Make an inner table frame with unconstrained block-size copy the IsBResize flag from its table-wrapper parent. r=TYLin

Differential Revision: https://phabricator.services.mozilla.com/D247456

layout/generic/ReflowInput.cpp

@@ -795,7 +795,10 @@ void ReflowInput::InitResizeFlags(nsPresContext* aPresContext,
     } else {
       SetBResize(IsIResize());
     }
-    SetBResize(IsBResize() || mFrame->IsSubtreeDirty());
+    SetBResize(IsBResize() || mFrame->IsSubtreeDirty() ||
+               // For an inner table frame, copy IsBResize from its wrapper.
+               (aFrameType == LayoutFrameType::Table &&
+                mParentReflowInput->IsBResize()));
   } else {
     // We have a non-'auto' block-size, i.e., a length.  Set the BResize
     // flag to whether the size is actually different.

testing/web-platform/meta/css/css-grid/table-grid-item-dynamic-004.html.ini

@@ -1,3 +0,0 @@
-[table-grid-item-dynamic-004.html]
-  bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1521088
-  expected: FAIL