[compositorworker] compositor proxy mutation updates underlying layers

third_party/WebKit/Source/web/CompositorProxyClientImpl.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CompositorProxyClientImpl_h
 #define CompositorProxyClientImpl_h
 
 #include "core/dom/CompositorProxyClient.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
+class CompositorMutableStateProvider;
 class CompositorMutatorImpl;
 class CompositorWorkerGlobalScope;
 class WorkerGlobalScope;
 
 // Mediates between one CompositorWorkerGlobalScope and the associated CompositorMutatorImpl.
 // There is one CompositorProxyClientImpl per worker but there may be multiple for a given
 // mutator, e.g. if a single document creates multiple CompositorWorker objects.
 //
 // Should be accessed only on the compositor thread.
 class CompositorProxyClientImpl final : public GarbageCollected<CompositorProxyClientImpl>, public CompositorProxyClient {
     USING_GARBAGE_COLLECTED_MIXIN(CompositorProxyClientImpl);
     WTF_MAKE_NONCOPYABLE(CompositorProxyClientImpl);
 public:
     CompositorProxyClientImpl(CompositorMutatorImpl*);
     DECLARE_VIRTUAL_TRACE();
 
     // Runs the animation frame callback for the frame starting at the given time.
     // Returns true if another animation frame was requested (i.e. should be reinvoked next frame).
-    bool mutate(double monotonicTimeNow);
+    bool mutate(double monotonicTimeNow, CompositorMutableStateProvider*);
 
     // CompositorProxyClient:
     void setGlobalScope(WorkerGlobalScope*) override;
     void requestAnimationFrame() override;
     void registerCompositorProxy(CompositorProxy*) override;
     void unregisterCompositorProxy(CompositorProxy*) override;
 
 private:
     bool executeAnimationFrameCallbacks(double monotonicTimeNow);
 
     Member<CompositorMutatorImpl> m_mutator;
 
     Member<CompositorWorkerGlobalScope> m_globalScope;
     bool m_requestedAnimationFrameCallbacks;
 
     HeapHashSet<WeakMember<CompositorProxy>> m_proxies;
 };
 
 } // namespace blink
 
 #endif // CompositorProxyClientImpl_h