Set paintingLayerNeedsRepaint() in layout tree

third_party/WebKit/Source/core/paint/PaintInvalidator.cpp

Index: third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
index 2edd221a78cf73e4479d4c830b7fc0a2887f04d5..d10a86d022d3e704bbc0969262180cda1268d03e 100644
--- a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
@@ -6,6 +6,7 @@
 
 #include "core/frame/FrameView.h"
 #include "core/layout/LayoutObject.h"
+#include "core/paint/PaintLayer.h"
 
 namespace blink {
 
@@ -26,11 +27,14 @@ void PaintInvalidator::invalidatePaintIfNeeded(const LayoutObject& layoutObject,
         paintInvalidatorContext->setForceSubtreeInvalidationCheckingWithinContainer();
 
     PaintInvalidationReason reason = layoutObject.getMutableForPainting().invalidatePaintIfNeeded(*paintInvalidatorContext);
-    layoutObject.getMutableForPainting().clearPaintInvalidationFlags(*paintInvalidatorContext);
-
     paintInvalidatorContext->updateForChildren(reason);
 }
 
+void PaintInvalidator::didWalkSubtrees(const PaintInvalidatorContext& context)
+{
+    context.currentObject().getMutableForPainting().clearPaintInvalidationFlags(context);
+}
+
 void PaintInvalidator::processPendingDelayedPaintInvalidations()
 {
     for (auto target : m_pendingDelayedPaintInvalidations)