Add flag for tracking descendant paint property updates

third_party/WebKit/Source/core/layout/VisualRectMappingTest.cpp

 // Copyright 2015 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/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/PaintInvalidationState.h"
 #include "core/paint/PaintLayer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 class VisualRectMappingTest : public RenderingTest {
  public:
   VisualRectMappingTest()
       : RenderingTest(SingleChildFrameLoaderClient::create()) {}
 
  protected:
   LayoutView& layoutView() const { return *document().layoutView(); }
 
   void checkPaintInvalidationStateRectMapping(
       const LayoutRect& expectedRect,
       const LayoutRect& rect,
       const LayoutObject& object,
       const LayoutView& layoutView,
       const LayoutObject& paintInvalidationContainer) {
     Vector<const LayoutObject*> ancestors;
     for (const LayoutObject* ancestor = &object; ancestor != layoutView;
-         ancestor = ancestor->paintInvalidationParent())
+         ancestor = ancestor->slowPaintInvalidationParentForTesting())
       ancestors.append(ancestor);
 
     Vector<Optional<PaintInvalidationState>> paintInvalidationStates(
         ancestors.size() + 1);
     Vector<const LayoutObject*> pendingDelayedPaintInvalidations;
     paintInvalidationStates[0].emplace(layoutView,
                                        pendingDelayedPaintInvalidations);
     if (layoutView != object)
       paintInvalidationStates[0]->updateForChildren(PaintInvalidationFull);
     for (size_t i = 1; i < paintInvalidationStates.size(); ++i) {
@@ skipping 651 matching lines @@
   LayoutRect targetVisualRect = target->localVisualRect();
   EXPECT_EQ(LayoutRect(0, 0, 400, 400), targetVisualRect);
   LayoutRect rect = targetVisualRect;
   EXPECT_TRUE(target->mapToVisualRectInAncestorSpace(&layoutView(), rect));
   EXPECT_EQ(LayoutRect(0, 0, 200, 200), rect);
   checkPaintInvalidationStateRectMapping(rect, targetVisualRect, *target,
                                          layoutView(), layoutView());
 }
 
 }  // namespace blink