Finish the rename from cc::GraphicsContext to cc::OutputSurface

cc/output_surface.h

Index: cc/output_surface.h
diff --git a/cc/output_surface.h b/cc/output_surface.h
new file mode 100644
index 0000000000000000000000000000000000000000..9f91c32c2eb7a78e2ad882ce63007eba681a7b8b
--- /dev/null
+++ b/cc/output_surface.h
@@ -0,0 +1,21 @@
+// 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_OUTPUT_SURFACE_H_
+#define CC_OUTPUT_SURFACE_H_
+
+#include <public/WebCompositorOutputSurface.h>
+
+namespace WebKit {
+class WebGraphicsContext3D;
+}
+
+namespace cc {
+
+// TODO(danakj): Move WebCompositorOutputSurface implementation to here.
+typedef WebKit::WebCompositorOutputSurface OutputSurface;
+
+}  // namespace cc
+
+#endif  // CC_OUTPUT_SURFACE_H_