Remove OwnPtr from Blink.

third_party/WebKit/Source/modules/webaudio/AudioNodeOutput.h

Index: third_party/WebKit/Source/modules/webaudio/AudioNodeOutput.h
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioNodeOutput.h b/third_party/WebKit/Source/modules/webaudio/AudioNodeOutput.h
index ebddbff9c6281edaf9587d780d02dd4a8b59a1e2..8fe931c39362265982d0ff5af8cc2cd544a2eb65 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioNodeOutput.h
+++ b/third_party/WebKit/Source/modules/webaudio/AudioNodeOutput.h
@@ -30,6 +30,7 @@
 #include "platform/audio/AudioBus.h"
 #include "wtf/HashSet.h"
 #include "wtf/RefPtr.h"
+#include <memory>
 
 namespace blink {
 
@@ -42,7 +43,7 @@ class AudioNodeOutput final {
 public:
     // It's OK to pass 0 for numberOfChannels in which case
     // setNumberOfChannels() must be called later on.
-    static PassOwnPtr<AudioNodeOutput> create(AudioHandler*, unsigned numberOfChannels);
+    static std::unique_ptr<AudioNodeOutput> create(AudioHandler*, unsigned numberOfChannels);
     void dispose();
 
     // Causes our AudioNode to process if it hasn't already for this render quantum.