Remove OwnPtr from Blink.

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 e97631580eb4be96ae65b4210799cb22d8cf7af6..504d3895021349d65c111842eb4ee45860f91711 100644
--- a/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.h
+++ b/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.h
@@ -8,8 +8,7 @@
 #include "platform/PlatformExport.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebCompositorMutatorClient.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassOwnPtr.h"
+#include <memory>
 
 namespace blink {
 
@@ -31,12 +30,12 @@ public:
 
     CompositorMutator* mutator() { return m_mutator.get(); }
 
-    void setMutationsForTesting(PassOwnPtr<CompositorMutations>);
+    void setMutationsForTesting(std::unique_ptr<CompositorMutations>);
 private:
     cc::LayerTreeMutatorClient* m_client;
     CompositorMutationsTarget* m_mutationsTarget;
     Persistent<CompositorMutator> m_mutator;
-    OwnPtr<CompositorMutations> m_mutations;
+    std::unique_ptr<CompositorMutations> m_mutations;
 };
 
 } // namespace blink