Fix touch event flag may not be updated correctly by transform which causes no layout

third_party/WebKit/Source/core/layout/LayoutBox.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index b9fc52f1614e8e8d8ba7aec0de6906023f0fa481..3855b720f4ec244aef7acf3dae1f4a7001fd43a9 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -55,6 +55,7 @@
 #include "core/layout/shapes/ShapeOutsideInfo.h"
 #include "core/page/AutoscrollController.h"
 #include "core/page/Page.h"
+#include "core/page/scrolling/ScrollingCoordinator.h"
 #include "core/page/scrolling/SnapCoordinator.h"
 #include "core/paint/BackgroundImageGeometry.h"
 #include "core/paint/BoxPaintInvalidator.h"
@@ -335,6 +336,11 @@ void LayoutBox::styleDidChange(StyleDifference diff,
     }
   }
 
+  if (diff.transformChanged()) {
+    if (ScrollingCoordinator* scrollingCoordinator =
+            document().frame()->page()->scrollingCoordinator())
+      scrollingCoordinator->notifyTransformChanged(*this);

[chrishtr, 2017/01/09 19:12:46]

Just call scrollingCoordinator->notifyGeometryChanged()?

[yigu, 2017/01/09 19:22:02]

It looks like notifyGeometryChanged() modifies other flags which is not
necessary. Plus notifyTransformChanged(.) has other optimization. Right?

+  }
   // Non-atomic inlines should be LayoutInline or LayoutText, not LayoutBox.
   DCHECK(!isInline() || isAtomicInlineLevel());
 }