Move compositor support out of base WebKitPlatformSupport into renderer

content/renderer/renderer_webkitplatformsupport_impl.h

Index: content/renderer/renderer_webkitplatformsupport_impl.h
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.h b/content/renderer/renderer_webkitplatformsupport_impl.h
index 9b56da260f765192bbd07aeb9dbe6cb830c4df45..715ced9eb90a2e1adddbec6099401a0821fa9516 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.h
+++ b/content/renderer/renderer_webkitplatformsupport_impl.h
@@ -13,6 +13,7 @@
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebIDBFactory.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSharedWorkerRepository.h"
+#include "webkit/compositor_bindings/web_compositor_support_impl.h"
 
 namespace cc {
 class ContextProvider;
@@ -119,6 +120,7 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
   virtual GrContext* sharedOffscreenGrContext();
   virtual WebKit::WebGraphicsContext3DProvider*
       createSharedOffscreenGraphicsContext3DProvider();
+  virtual WebKit::WebCompositorSupport* compositorSupport();
 
   // Disables the WebSandboxSupport implementation for testing.
   // Tests that do not set up a full sandbox environment should call
@@ -174,6 +176,8 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
 
   scoped_refptr<cc::ContextProvider> shared_offscreen_context_;
+
+  webkit::WebCompositorSupportImpl compositor_support_;
 };
 
 }  // namespace content