compositor-worker: Initialize CW machinery plumbing to compositor and fire CW rAF callbacks.

third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.h

Index: third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.h
diff --git a/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.h b/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.h
index 1c5ee5e761679bb3a008c14deb55e34c8b71fbaa..a07d94c933e0695565740176eb6f7461083e317d 100644
--- a/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.h
+++ b/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.h
@@ -12,19 +12,26 @@
 
 namespace blink {
 
+class CompositorMutator;
 struct CompositorMutations;
 class CompositorMutationsTarget;
 
 class PLATFORM_EXPORT CompositorMutatorClient : public WebCompositorMutatorClient {
 public:
-    CompositorMutatorClient(CompositorMutationsTarget*);
+    CompositorMutatorClient(CompositorMutator*, CompositorMutationsTarget*);
     virtual ~CompositorMutatorClient();
 
+    void setNeedsMutate();
+
     // cc::LayerTreeMutator
+    bool Mutate(base::TimeTicks timeNow) override;
+    void SetClient(cc::LayerTreeMutatorClient*) override;
     base::Closure TakeMutations() override;
 
     void setMutationsForTesting(PassOwnPtr<CompositorMutations>);
 private:
+    cc::LayerTreeMutatorClient* m_client;
+    CompositorMutator* m_mutator;
     CompositorMutationsTarget* m_mutationsTarget;
     OwnPtr<CompositorMutations> m_mutations;
 };