Subtree caching implementation in blink-core

Source/core/layout/LayoutObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1173 matching lines @@
         DisableCompositingQueryAsserts disabler;
         if (const DeprecatedPaintLayer* paintInvalidationLayer = enclosingLayer->enclosingLayerForPaintInvalidationCrossingFrameBoundaries())
             paintInvalidationLayer->layoutObject()->invalidateDisplayItemClientOnBacking(displayItemClient);
     }
 }
 
 void LayoutObject::invalidateDisplayItemClients(const LayoutBoxModelObject& paintInvalidationContainer) const
 {
     ASSERT(RuntimeEnabledFeatures::slimmingPaintEnabled());
     paintInvalidationContainer.invalidateDisplayItemClientOnBacking(*this);
+
+    if (RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+        enclosingLayer()->setNeedsRepaint();
 }
 
 LayoutRect LayoutObject::boundsRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
 {
     if (!paintInvalidationContainer)
         return computePaintInvalidationRect(paintInvalidationContainer, paintInvalidationState);
     return DeprecatedPaintLayer::computePaintInvalidationRect(this, paintInvalidationContainer->layer(), paintInvalidationState);
 }
 
 const LayoutBoxModelObject* LayoutObject::invalidatePaintRectangleInternal(const LayoutRect& r) const
@@ skipping 2205 matching lines @@
         const blink::LayoutObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
     } else {
         fprintf(stderr, "Cannot showLayoutTree. Root is (nil)\n");
     }
 }
 
 #endif