gpu: Compositor management of GpuMemoryBuffer instances.

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index a987d46ecfcb211688f7b6e27e6aec420639d365..0eab20e67a33ed445f1d5f5d7403304c67f891d9 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -120,7 +120,8 @@ class CC_EXPORT LayerTreeHostImpl
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
-      SharedBitmapManager* manager,
+      SharedBitmapManager* shared_bitmap_manager,
+      GpuMemoryBufferManager* gpu_memory_buffer_manager,
       int id);
   virtual ~LayerTreeHostImpl();
 
@@ -487,7 +488,8 @@ class CC_EXPORT LayerTreeHostImpl
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
-      SharedBitmapManager* manager,
+      SharedBitmapManager* shared_bitmap_manager,
+      GpuMemoryBufferManager* gpu_memory_buffer_manager,
       int id);
 
   void UpdateInnerViewportContainerSize();
@@ -696,6 +698,7 @@ class CC_EXPORT LayerTreeHostImpl
   base::Closure tree_activation_callback_;
 
   SharedBitmapManager* shared_bitmap_manager_;
+  GpuMemoryBufferManager* gpu_memory_buffer_manager_;
   int id_;
 
   std::set<SwapPromiseMonitor*> swap_promise_monitor_;