Remove OwnPtr from Blink.

third_party/WebKit/Source/modules/webmidi/MIDIAccessor.cpp

Index: third_party/WebKit/Source/modules/webmidi/MIDIAccessor.cpp
diff --git a/third_party/WebKit/Source/modules/webmidi/MIDIAccessor.cpp b/third_party/WebKit/Source/modules/webmidi/MIDIAccessor.cpp
index 47d2bce820b001c3b68544ac082dc7ccf1297283..262b448aea3da0fffa4ad66ee0d825dfd6953d5f 100644
--- a/third_party/WebKit/Source/modules/webmidi/MIDIAccessor.cpp
+++ b/third_party/WebKit/Source/modules/webmidi/MIDIAccessor.cpp
@@ -32,16 +32,18 @@
 
 #include "modules/webmidi/MIDIAccessorClient.h"
 #include "public/platform/Platform.h"
+#include "wtf/PtrUtil.h"
 #include "wtf/text/WTFString.h"
+#include <memory>
 
 using blink::WebString;
 
 namespace blink {
 
 // Factory method
-PassOwnPtr<MIDIAccessor> MIDIAccessor::create(MIDIAccessorClient* client)
+std::unique_ptr<MIDIAccessor> MIDIAccessor::create(MIDIAccessorClient* client)
 {
-    return adoptPtr(new MIDIAccessor(client));
+    return wrapUnique(new MIDIAccessor(client));
 }
 
 MIDIAccessor::MIDIAccessor(MIDIAccessorClient* client)
@@ -49,7 +51,7 @@ MIDIAccessor::MIDIAccessor(MIDIAccessorClient* client)
 {
     DCHECK(client);
 
-    m_accessor = adoptPtr(Platform::current()->createMIDIAccessor(this));
+    m_accessor = wrapUnique(Platform::current()->createMIDIAccessor(this));
 
     DCHECK(m_accessor);
 }