Add CCDelegatingRenderer, and corresponding IPCs

cc/TiledLayerChromium.cpp

Index: cc/TiledLayerChromium.cpp
diff --git a/cc/TiledLayerChromium.cpp b/cc/TiledLayerChromium.cpp
index 1ab8f62eefb5ec6533199b15d342aadcab7ee23d..fe2ec48fdf92da9955368a743747c35bf3964fb5 100644
--- a/cc/TiledLayerChromium.cpp
+++ b/cc/TiledLayerChromium.cpp
@@ -11,7 +11,9 @@
 
 #include "CCLayerImpl.h"
 #include "CCLayerTreeHost.h"
+#include "CCLayerTreeHostImpl.h"
 #include "CCOverdrawMetrics.h"
+#include "CCResourceProvider.h"
 #include "CCTextureUpdateQueue.h"
 #include "CCTiledLayerImpl.h"
 #include "GraphicsContext3D.h"
@@ -203,6 +205,7 @@ void TiledLayerChromium::pushPropertiesTo(CCLayerImpl* layer)
     tiledLayer->setContentsSwizzled(m_sampledTexelFormat != LayerTextureUpdater::SampledTexelFormatRGBA);
     tiledLayer->setTilingData(*m_tiler);
     Vector<UpdatableTile*> invalidTiles;
+    CCResourceProvider* resourceProvider = tiledLayer->layerTreeHostImpl()->resourceProvider();
 
     for (CCLayerTilingData::TileMap::const_iterator iter = m_tiler->tiles().begin(); iter != m_tiler->tiles().end(); ++iter) {
 #if WTF_NEW_HASHMAP_ITERATORS_INTERFACE
@@ -217,18 +220,19 @@ void TiledLayerChromium::pushPropertiesTo(CCLayerImpl* layer)
         // FIXME: This should not ever be null.
         if (!tile)
             continue;
-
-        tile->isInUseOnImpl = false;
-
         if (!tile->managedTexture()->haveBackingTexture()) {
             // Evicted tiles get deleted from both layers
             invalidTiles.append(tile);
+            tile->isInUseOnImpl = false;
             continue;
         }
-
         if (!tile->validForFrame) {
             // Invalidated tiles are set so they can get different debug colors.
             tiledLayer->pushInvalidTile(i, j);
+            CCResourceProvider::ResourceId id = tile->managedTexture()->resourceId();
+            ASSERT(id);
+            if (!resourceProvider->inUseByConsumer(id) /* && ubercomp */)
+                tile->isInUseOnImpl = false;
             continue;
         }
 
@@ -614,7 +618,7 @@ void TiledLayerChromium::setTexturePriorities(const CCPriorityCalculator& priori
     // Also, minimally create all tiles for small animated layers and also
     // double-buffer them since we have limited their size to be reasonable.
     IntRect doubleBufferedRect = visibleContentRect();
-    if (smallAnimatedLayer)
+    if (smallAnimatedLayer || true /* s/true/ubercomp */)
         doubleBufferedRect = IntRect(IntPoint::zero(), contentBounds());
 
     // Create additional textures for double-buffered updates when needed.