WIP - compositor worker mega patch.

cc/blink/web_compositor_support_impl.cc

Index: cc/blink/web_compositor_support_impl.cc
diff --git a/cc/blink/web_compositor_support_impl.cc b/cc/blink/web_compositor_support_impl.cc
index f50594e0f9d61bb0a32e90672cf0696b96dda5eb..e472b0649ac640ed1c6b500ea42e21810d11ad6d 100644
--- a/cc/blink/web_compositor_support_impl.cc
+++ b/cc/blink/web_compositor_support_impl.cc
@@ -17,6 +17,7 @@
 #include "cc/blink/web_float_animation_curve_impl.h"
 #include "cc/blink/web_image_layer_impl.h"
 #include "cc/blink/web_layer_impl.h"
+#include "cc/blink/web_mutator_client_impl.h"
 #include "cc/blink/web_scroll_offset_animation_curve_impl.h"
 #include "cc/blink/web_scrollbar_layer_impl.h"
 #include "cc/blink/web_transform_animation_curve_impl.h"
@@ -134,6 +135,11 @@ WebFilterOperations* WebCompositorSupportImpl::createFilterOperations() {
   return new WebFilterOperationsImpl();
 }
 
+blink::WebMutatorClient* WebCompositorSupportImpl::createMutatorClient(
+    blink::WebMutator* mutator) {
+  return new WebMutatorClientImpl(mutator);
+}
+
 WebCompositorAnimationPlayer*
 WebCompositorSupportImpl::createAnimationPlayer() {
   return new WebCompositorAnimationPlayerImpl();