Use base::ScopedTypeRef for CGL types

content/browser/renderer_host/display_link_mac.h

 // Copyright 2014 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 CONTENT_BROWSER_RENDERER_HOST_DISPLAY_LINK_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_DISPLAY_LINK_MAC_H_
 
-#import <QuartzCore/CVDisplayLink.h>
+#include <QuartzCore/CVDisplayLink.h>
 
+#include "base/mac/scoped_typeref.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 
 namespace content {
 
 class DisplayLinkMac : public base::RefCounted<DisplayLinkMac> {
  public:
   static scoped_refptr<DisplayLinkMac> Create();
 
   // Get vsync scheduling parameters.
   bool GetVSyncParameters(
       base::TimeTicks* timebase,
       base::TimeDelta* interval);
 
  private:
   friend class base::RefCounted<DisplayLinkMac>;
+  typedef base::ScopedTypeRef<
+      CVDisplayLinkRef,
+      CVDisplayLinkRef,
+      CVDisplayLinkRetain,
+      CVDisplayLinkRelease>
+          ScopedCVDisplayLinkRef;
 
-  DisplayLinkMac(CVDisplayLinkRef display_link);
+  DisplayLinkMac(ScopedCVDisplayLinkRef display_link);
   virtual ~DisplayLinkMac();
 
   void StartOrContinueDisplayLink();
   void StopDisplayLink();
   void Tick(const CVTimeStamp* time);
 
   static CVReturn DisplayLinkCallback(
       CVDisplayLinkRef display_link,
       const CVTimeStamp* now,
       const CVTimeStamp* output_time,
       CVOptionFlags flags_in,
       CVOptionFlags* flags_out,
       void* context);
 
   // CVDisplayLink for querying VSync timing info.
-  CVDisplayLinkRef display_link_;
+  ScopedCVDisplayLinkRef display_link_;
 
   // Timer for stopping the display link if it has not been queried in
   // the last second.
   base::DelayTimer<DisplayLinkMac> stop_timer_;
 
   // VSync parameters computed during Tick.
   bool timebase_and_interval_valid_;
   base::TimeTicks timebase_;
   base::TimeDelta interval_;
 
   // Lock for sharing data between UI thread and display-link thread.
   base::Lock lock_;
 };
 
 }  // content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_DISPLAY_LINK_MAC_H_