[compositorworker] compositor proxy mutation updates underlying layers

third_party/WebKit/Source/web/CompositorMutatorImpl.h

 // Copyright 2016 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 CompositorMutatorImpl_h
 #define CompositorMutatorImpl_h
 
 #include "core/animation/CustomCompositorAnimationManager.h"
 #include "platform/graphics/CompositorMutator.h"
 #include "platform/heap/Handle.h"
@@ skipping 21 matching lines @@
     static std::unique_ptr<CompositorMutatorClient> createClient();
     static CompositorMutatorImpl* create();
 
     DEFINE_INLINE_TRACE()
     {
         CompositorMutator::trace(visitor);
         visitor->trace(m_proxyClients);
     }
 
     // CompositorMutator implementation.
-    bool mutate(double monotonicTimeNow) override;
+    bool mutate(double monotonicTimeNow, CompositorMutableStateProvider*) override;
 
     void registerProxyClient(CompositorProxyClientImpl*);
 
     void setNeedsMutate();
 
     void setClient(CompositorMutatorClient* client) { m_client = client; }
     CustomCompositorAnimationManager* animationManager() { return m_animationManager.get(); }
 
 private:
     CompositorMutatorImpl();
 
     using ProxyClients = HeapHashSet<WeakMember<CompositorProxyClientImpl>>;
     ProxyClients m_proxyClients;
 
     OwnPtr<CustomCompositorAnimationManager> m_animationManager;
     CompositorMutatorClient* m_client;
 };
 
 } // namespace blink
 
 #endif // CompositorMutatorImpl_h