Remove OwnPtr from Blink.

third_party/WebKit/Source/platform/mediastream/MediaStreamCenter.h

Index: third_party/WebKit/Source/platform/mediastream/MediaStreamCenter.h
diff --git a/third_party/WebKit/Source/platform/mediastream/MediaStreamCenter.h b/third_party/WebKit/Source/platform/mediastream/MediaStreamCenter.h
index c66695560169ca1d87c713e1613213304da381c4..a3b047e63676b95089cd7b192c7a0b809028d379 100644
--- a/third_party/WebKit/Source/platform/mediastream/MediaStreamCenter.h
+++ b/third_party/WebKit/Source/platform/mediastream/MediaStreamCenter.h
@@ -35,9 +35,9 @@
 #include "platform/heap/Handle.h"
 #include "public/platform/WebMediaStreamCenterClient.h"
 #include "wtf/Allocator.h"
-#include "wtf/OwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
+#include <memory>
 
 namespace blink {
 
@@ -59,7 +59,7 @@ public:
     void didCreateMediaStreamTrack(MediaStreamComponent*);
     void didSetMediaStreamTrackEnabled(MediaStreamComponent*);
     bool didStopMediaStreamTrack(MediaStreamComponent*);
-    PassOwnPtr<AudioSourceProvider> createWebAudioSourceFromMediaStreamTrack(MediaStreamComponent*);
+    std::unique_ptr<AudioSourceProvider> createWebAudioSourceFromMediaStreamTrack(MediaStreamComponent*);
 
     void didCreateMediaStream(MediaStreamDescriptor*);
     void didCreateMediaStreamAndTracks(MediaStreamDescriptor*);
@@ -73,7 +73,7 @@ public:
 private:
     MediaStreamCenter();
 
-    OwnPtr<WebMediaStreamCenter> m_private;
+    std::unique_ptr<WebMediaStreamCenter> m_private;
 };
 
 } // namespace blink