Revert "Remove OwnPtr from Blink."

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"
 #include "platform/heap/HeapAllocator.h"
 #include "wtf/Noncopyable.h"
-#include <memory>
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class CompositorProxy;
 class CompositorProxyClientImpl;
 class CompositorWorkerGlobalScope;
 class CompositorMutatorClient;
 
 // Fans out requests from the compositor to all of the registered ProxyClients which
 // can then mutate layers through their CompositorProxy interfaces. Requests for
@@ skipping 22 matching lines @@
 
     void setClient(CompositorMutatorClient* client) { m_client = client; }
     CustomCompositorAnimationManager* animationManager() { return m_animationManager.get(); }
 
 private:
     CompositorMutatorImpl();
 
     using ProxyClients = HeapHashSet<WeakMember<CompositorProxyClientImpl>>;
     ProxyClients m_proxyClients;
 
-    std::unique_ptr<CustomCompositorAnimationManager> m_animationManager;
+    OwnPtr<CustomCompositorAnimationManager> m_animationManager;
     CompositorMutatorClient* m_client;
 };
 
 } // namespace blink
 
 #endif // CompositorMutatorImpl_h