cc: Route offscreen context creation for compositor to the browser.

cc/renderer.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_RENDERER_H_
 #define CC_RENDERER_H_
 
 #include "base/basictypes.h"
 #include "cc/cc_export.h"
 #include "cc/layer_tree_host.h"
 #include "cc/managed_memory_policy.h"
 #include "cc/render_pass.h"
 
+class GrContext;
+namespace WebKit { class WebGraphicsContext3D; }
+
 namespace cc {
 
 class CompositorFrameAck;
 class CompositorFrameMetadata;
 class ScopedResource;
 
 class CC_EXPORT RendererClient {
 public:
     virtual const gfx::Size& deviceViewportSize() const = 0;
     virtual const LayerTreeSettings& settings() const = 0;
@@ skipping 53 matching lines @@
     }
 
     RendererClient* m_client;
 
     DISALLOW_COPY_AND_ASSIGN(Renderer);
 };
 
 }
 
 #endif  // CC_RENDERER_H_