Repaint on interest rect change

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 92 matching lines @@
     // to compare assuming the full cost of recording, not the cost of re-using cached content.
     if (paintingControl != WebContentLayerClient::PaintDefaultBehavior)
         paintController->invalidateAll();
 
     GraphicsContext::DisabledMode disabledMode = GraphicsContext::NothingDisabled;
     if (paintingControl == WebContentLayerClient::DisplayListPaintingDisabled
         || paintingControl == WebContentLayerClient::DisplayListConstructionDisabled)
         disabledMode = GraphicsContext::FullyDisabled;
     GraphicsContext context(*paintController, disabledMode);
 
-    m_painter->paint(context, clip);
+    IntRect interestRect = clip;
+    m_painter->paint(context, &interestRect);
 
     paintController->commitNewDisplayItems();
     paintArtifactToWebDisplayItemList(webDisplayItemList, paintController->paintArtifact(), clip);
 }
 
 size_t ContentLayerDelegate::approximateUnsharedMemoryUsage() const
 {
     return m_painter->paintController()->approximateUnsharedMemoryUsage();
 }
 
 } // namespace blink