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

third_party/WebKit/Source/core/editing/CaretDisplayItemClient.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 163 matching lines @@
 
 void CaretDisplayItemClient::invalidatePaintInPreviousLayoutBlock(
     const PaintInvalidatorContext& context,
     PaintInvalidationReason layoutBlockPaintInvalidationReason) {
   DCHECK(m_previousLayoutBlock);
 
   ObjectPaintInvalidatorWithContext objectInvalidator(*m_previousLayoutBlock,
                                                       context);
   if (!isImmediateFullPaintInvalidationReason(
           layoutBlockPaintInvalidationReason)) {
-    objectInvalidator.invalidatePaintUsingContainer(
-        *context.paintInvalidationContainer, m_previousVisualRect,
-        PaintInvalidationCaret);
+    objectInvalidator.invalidatePaintRectangleWithContext(
+        m_previousVisualRect, PaintInvalidationCaret);
   }
 
   context.paintingLayer->setNeedsRepaint();
   objectInvalidator.invalidateDisplayItemClient(*this, PaintInvalidationCaret);
   m_previousLayoutBlock = nullptr;
 }
 
 void CaretDisplayItemClient::invalidatePaintInCurrentLayoutBlock(
     const PaintInvalidatorContext& context,
     PaintInvalidationReason layoutBlockPaintInvalidationReason) {
@@ skipping 51 matching lines @@
 
 String CaretDisplayItemClient::debugName() const {
   return "Caret";
 }
 
 LayoutRect CaretDisplayItemClient::visualRect() const {
   return m_visualRect;
 }
 
 }  // namespace blink