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 b4a5f0d331840567bc42f03895c846d9f4e5cabb..f4a3e11d8bc7e34bc4d5fab52ddd176299c3eeae 100644
--- a/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.cpp
@@ -66,11 +66,11 @@ 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;
 }