Add paint testing mode subsequence_caching_disabled

third_party/WebKit/Source/platform/graphics/ContentLayerDelegate.cpp

 /*
  * Copyright (C) 2012 Google 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 60 matching lines @@
 }
 
 void ContentLayerDelegate::paintContents(
     WebDisplayItemList* webDisplayItemList, WebContentLayerClient::PaintingControlSetting paintingControl)
 {
     TRACE_EVENT0("blink,benchmark", "ContentLayerDelegate::paintContents");
 
     PaintController& paintController = m_graphicsLayer->paintController();
     paintController.setDisplayItemConstructionIsDisabled(
         paintingControl == WebContentLayerClient::DisplayListConstructionDisabled);
+    paintController.setSubsequenceCachingIsDisabled(
+        paintingControl == WebContentLayerClient::SubsequenceCachingDisabled);
 
     // We also disable caching when Painting or Construction are disabled. In both cases we would like
     // to compare assuming the full cost of recording, not the cost of re-using cached content.
-    if (paintingControl != WebContentLayerClient::PaintDefaultBehavior)
+    if (paintingControl != WebContentLayerClient::PaintDefaultBehavior
+        && paintingControl != WebContentLayerClient::SubsequenceCachingDisabled)
         paintController.invalidateAll();
 
     GraphicsContext::DisabledMode disabledMode = GraphicsContext::NothingDisabled;
     if (paintingControl == WebContentLayerClient::DisplayListPaintingDisabled
         || paintingControl == WebContentLayerClient::DisplayListConstructionDisabled)
         disabledMode = GraphicsContext::FullyDisabled;
 
     m_graphicsLayer->paint(nullptr, disabledMode);
     paintArtifactToWebDisplayItemList(webDisplayItemList, paintController.paintArtifact(), paintableRegion());
     paintController.setDisplayItemConstructionIsDisabled(false);
+    paintController.setSubsequenceCachingIsDisabled(false);
 }
 
 size_t ContentLayerDelegate::approximateUnsharedMemoryUsage() const
 {
     return m_graphicsLayer->paintController().approximateUnsharedMemoryUsage();
 }
 
 } // namespace blink