WIP - compositor worker mega patch.

third_party/WebKit/Source/web/WebMutatorImpl.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 WebMutatorImpl_h
+#define WebMutatorImpl_h
+
+#include "public/platform/WebMutation.h"
+#include "public/platform/WebMutator.h"
+#include "wtf/HashSet.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace blink {
+
+class CompositorProxy;
+class CompositorProxyClient;
+class CompositorProxyClientImpl;
+class CompositorWorkerGlobalScope;
+class WebMutatorClient;
+class WebWaitableEvent;
+
+class BLINK_EXPORT WebMutatorImpl final : public WebMutator {
+    WTF_MAKE_NONCOPYABLE(WebMutatorImpl);
+
+public:
+    static PassOwnPtr<WebMutatorImpl> create();
+    ~WebMutatorImpl() override;
+
+    // WebMutator implementation.
+    bool mutate(double timeNow, WebCompositorMutableStateProvider*) override;
+
+    void registerClient(CompositorProxyClientImpl*);
+    void unregisterClient(CompositorProxyClientImpl*);
+
+    CompositorProxyClient* createCompositorProxyClient();
+    WebMutatorClient* client() { return m_client.get(); }
+
+    void setNeedsMutate();
+
+private:
+    WebMutatorImpl();
+
+    typedef HashSet<CompositorProxyClientImpl*> Clients;
+    Clients m_clients;
+
+    OwnPtr<WebMutatorClient> m_client;
+};
+
+} // namespace blink
+
+#endif // WebMutatorImpl_h