Move compositor support out of base WebKitPlatformSupport into renderer

webkit/support/test_webkit_platform_support.h

Index: webkit/support/test_webkit_platform_support.h
diff --git a/webkit/support/test_webkit_platform_support.h b/webkit/support/test_webkit_platform_support.h
index a9fd7c5fac770e249131bbc28d70bb583d672ca4..79bd6f26ce519eba2a58053eea0d38d2d67b7e01 100644
--- a/webkit/support/test_webkit_platform_support.h
+++ b/webkit/support/test_webkit_platform_support.h
@@ -9,6 +9,7 @@
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGamepads.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebUnitTestSupport.h"
+#include "webkit/compositor_bindings/web_compositor_support_impl.h"
 #include "webkit/glue/webfileutilities_impl.h"
 #include "webkit/glue/webkitplatformsupport_impl.h"
 #include "webkit/mocks/mock_webhyphenator.h"
@@ -95,6 +96,7 @@ class TestWebKitPlatformSupport :
       createSharedOffscreenGraphicsContext3DProvider();
   virtual bool canAccelerate2dCanvas();
   virtual bool isThreadedCompositingEnabled();
+  virtual WebKit::WebCompositorSupport* compositorSupport();
 
   WebURLLoaderMockFactory* url_loader_factory() {
     return &url_loader_factory_;
@@ -184,6 +186,7 @@ class TestWebKitPlatformSupport :
   WebKit::WebGamepads gamepad_data_;
   WebKit::Platform* shadow_platform_delegate_;
   bool threaded_compositing_enabled_;
+  webkit::WebCompositorSupportImpl compositor_support_;
 
   scoped_refptr<cc::ContextProvider> main_thread_contexts_;