Add logic to GLRenderer to support RenderPassDrawQuad copying.

cc/resources/resource_provider.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 202 matching lines @@
   // by assertions.
   class CC_EXPORT ScopedReadLockGL {
    public:
     ScopedReadLockGL(ResourceProvider* resource_provider,
                      ResourceId resource_id);
     ~ScopedReadLockGL();
 
     unsigned texture_id() const { return texture_id_; }
     GLenum target() const { return target_; }
     const gfx::Size& size() const { return size_; }
+    ResourceId resource_id() const { return resource_id_; }
 
    private:
     ResourceProvider* resource_provider_;
     ResourceId resource_id_;
     unsigned texture_id_;
     GLenum target_;
     gfx::Size size_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedReadLockGL);
   };
@@ skipping 464 matching lines @@
   // A process-unique ID used for disambiguating memory dumps from different
   // resource providers.
   int tracing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_