Get rid of one-off paint invalidation code for paints-into-ancestor compositing state

Source/core/rendering/compositing/GraphicsLayerUpdater.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2014 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
@@ skipping 74 matching lines @@
 
 void GraphicsLayerUpdater::updateRecursive(RenderLayer& layer, UpdateType updateType, const UpdateContext& context, Vector<RenderLayer*>& layersNeedingPaintInvalidation)
 {
     if (layer.hasCompositedLayerMapping()) {
         CompositedLayerMappingPtr mapping = layer.compositedLayerMapping();
 
         if (updateType == ForceUpdate || mapping->needsGraphicsLayerUpdate()) {
             const RenderLayer* compositingContainer = context.compositingContainer(layer);
             ASSERT(compositingContainer == layer.ancestorCompositingLayer());
 
-            if (mapping->updateRequiresOwnBackingStoreForAncestorReasons(compositingContainer))
+            if (mapping->updateRequiresOwnBackingStoreForAncestorReasons(compositingContainer)) {
+                layersNeedingPaintInvalidation.append(&layer);
                 updateType = ForceUpdate;
+            }
 
             // Note carefully: here we assume that the compositing state of all descendants have been updated already,
             // so it is legitimate to compute and cache the composited bounds for this layer.
             mapping->updateCompositedBounds();
 
             if (RenderLayerReflectionInfo* reflection = layer.reflectionInfo()) {
                 if (reflection->reflectionLayer()->hasCompositedLayerMapping())
                     reflection->reflectionLayer()->compositedLayerMapping()->updateCompositedBounds();
             }
 
@@ skipping 22 matching lines @@
     if (layer.hasCompositedLayerMapping())
         layer.compositedLayerMapping()->assertNeedsToUpdateGraphicsLayerBitsCleared();
 
     for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
         assertNeedsToUpdateGraphicsLayerBitsCleared(*child);
 }
 
 #endif
 
 } // namespace WebCore