*** NOT FOR LANDING *** Paint investigations for bug 667370

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 0cb65d11480e24aa73e89c27b73c1217e8036850..ae7d3d4c70a73349a95bd48e864a6cb36eaffa90 100644
--- a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
@@ -442,9 +442,10 @@ void PaintInvalidator::invalidatePaintIfNeeded(
       // Note that isLayoutView() below becomes unnecessary after the launch of
       // root layer scrolling.
       && (object.hasOverflowClip() || object.isLayoutView()) &&
-      !toLayoutBox(object).usesCompositedScrolling())
-    context.forcedSubtreeInvalidationFlags |=
-        PaintInvalidatorContext::ForcedSubtreeInvalidationRectUpdate;
+      !toLayoutBox(object).usesCompositedScrolling()) {
+//    context.forcedSubtreeInvalidationFlags |=
+//        PaintInvalidatorContext::ForcedSubtreeInvalidationRectUpdate;
+  }
 }
 
 void PaintInvalidator::processPendingDelayedPaintInvalidations() {