Don't invalidate rect if it's covered by fully invalidated parent's visual rect

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

Index: third_party/WebKit/Source/core/paint/BoxPaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.cpp
index 23d2efba1c73b9e55b940bde70e1b4d325eaafe1..edd99540927ccc73030a5ce0c337a9fe18c3b34e 100644
--- a/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.cpp
@@ -85,11 +85,11 @@ bool BoxPaintInvalidator::incrementallyInvalidatePaint(
   if (rightDelta.isEmpty() && bottomDelta.isEmpty())
     return false;
 
-  ObjectPaintInvalidator objectPaintInvalidator(m_box);
-  objectPaintInvalidator.invalidatePaintUsingContainer(
-      *m_context.paintInvalidationContainer, rightDelta, reason);
-  objectPaintInvalidator.invalidatePaintUsingContainer(
-      *m_context.paintInvalidationContainer, bottomDelta, reason);
+  ObjectPaintInvalidatorWithContext objectPaintInvalidator(m_box, m_context);
+  objectPaintInvalidator.invalidatePaintRectangleWithContext(rightDelta,
+                                                             reason);
+  objectPaintInvalidator.invalidatePaintRectangleWithContext(bottomDelta,
+                                                             reason);
   return true;
 }