cc: Changes to use GL API for GpuMemoryBuffers

cc/resources/resource_provider.h

Index: cc/resources/resource_provider.h
diff --git a/cc/resources/resource_provider.h b/cc/resources/resource_provider.h
index e964437757ba5ed4e6f7c8356bb083cc00c78e67..98c05cca193a651ec5233187abf842be604dc46b 100644
--- a/cc/resources/resource_provider.h
+++ b/cc/resources/resource_provider.h
@@ -314,11 +314,15 @@ class CC_EXPORT ResourceProvider {
     offscreen_context_provider_ = offscreen_context_provider;
   }
 
+  // Sets if zero-copy GPU memory buffers should be used.
+  void SetUseGpuMemoryBuffers(bool use_gpu_memory_buffers);
+
  private:
   struct Resource {
     Resource();
     ~Resource();
-    Resource(unsigned texture_id, gfx::Size size, GLenum format, GLenum filter);
+    Resource(unsigned texture_id, gfx::Size size, GLenum format, GLenum filter,
+             bool use_gpu_memory_buffer);
     Resource(uint8_t* pixels, gfx::Size size, GLenum format, GLenum filter);
 
     unsigned gl_id;
@@ -344,6 +348,7 @@ class CC_EXPORT ResourceProvider {
     // TODO(skyostil): Use a separate sampler object for filter state.
     GLenum filter;
     ResourceType type;
+    bool use_gpu_memory_buffer;
   };
   typedef base::hash_map<ResourceId, Resource> ResourceMap;
   struct Child {
@@ -379,6 +384,7 @@ class CC_EXPORT ResourceProvider {
   };
   void DeleteResourceInternal(ResourceMap::iterator it, DeleteStyle style);
   void LazyAllocate(Resource* resource);
+  GLenum GetTargetGivenResource(Resource* resource);
 
   OutputSurface* output_surface_;
   bool lost_output_surface_;
@@ -402,6 +408,8 @@ class CC_EXPORT ResourceProvider {
 
   scoped_refptr<Fence> current_read_lock_fence_;
 
+  bool use_gpu_memory_buffers_;
+
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };