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

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/BoxPaintInvalidator.h"
 
 #include "core/frame/Settings.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/compositing/CompositedLayerMapping.h"
 #include "core/paint/ObjectPaintInvalidator.h"
@@ skipping 48 matching lines @@
       reason == PaintInvalidationIncremental ? m_box.borderRight()
                                              : LayoutUnit());
   LayoutRect bottomDelta = computeBottomDelta(
       newRect.location(), oldRect.size(), newRect.size(),
       reason == PaintInvalidationIncremental ? m_box.borderBottom()
                                              : LayoutUnit());
 
   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;
 }
 
 PaintInvalidationReason BoxPaintInvalidator::computePaintInvalidationReason() {
   PaintInvalidationReason reason =
       ObjectPaintInvalidatorWithContext(m_box, m_context)
           .computePaintInvalidationReason();
 
   if (reason != PaintInvalidationIncremental)
     return reason;
@@ skipping 236 matching lines @@
   if (needsToSavePreviousContentBoxSizeOrLayoutOverflowRect()) {
     m_box.getMutableForPainting()
         .savePreviousContentBoxSizeAndLayoutOverflowRect();
   } else {
     m_box.getMutableForPainting()
         .clearPreviousContentBoxSizeAndLayoutOverflowRect();
   }
 }
 
 }  // namespace blink