Move compositor support out of base WebKitPlatformSupport into renderer

webkit/support/test_webkit_platform_support.cc

Index: webkit/support/test_webkit_platform_support.cc
diff --git a/webkit/support/test_webkit_platform_support.cc b/webkit/support/test_webkit_platform_support.cc
index 45f5b52dad8a915e43a58b62910ae880f0680ce8..8d4bd7ca2a7ccf0f16baec87d38d9e13173b8719 100644
--- a/webkit/support/test_webkit_platform_support.cc
+++ b/webkit/support/test_webkit_platform_support.cc
@@ -410,6 +410,11 @@ bool TestWebKitPlatformSupport::isThreadedCompositingEnabled() {
   return threaded_compositing_enabled_;
 }
 
+WebKit::WebCompositorSupport*
+TestWebKitPlatformSupport::compositorSupport() {
+  return &compositor_support_;
+}
+
 double TestWebKitPlatformSupport::audioHardwareSampleRate() {
   return 44100.0;
 }