Use base::ScopedTypeRef for CGL types

content/browser/renderer_host/display_link_mac.h

Index: content/browser/renderer_host/display_link_mac.h
diff --git a/content/browser/renderer_host/display_link_mac.h b/content/browser/renderer_host/display_link_mac.h
index 9398015f77a830d79d2017fece85b0a0d617dae6..8af09c4f652f3233e0395e4d366cbe6b8bd8bb7b 100644
--- a/content/browser/renderer_host/display_link_mac.h
+++ b/content/browser/renderer_host/display_link_mac.h
@@ -5,8 +5,9 @@
 #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"
@@ -25,8 +26,14 @@ class DisplayLinkMac : public base::RefCounted<DisplayLinkMac> {
 
  private:
   friend class base::RefCounted<DisplayLinkMac>;
-
-  DisplayLinkMac(CVDisplayLinkRef display_link);
+  typedef base::ScopedTypeRef<
+      CVDisplayLinkRef,
+      CVDisplayLinkRef,
+      CVDisplayLinkRetain,
+      CVDisplayLinkRelease>
+          ScopedCVDisplayLinkRef;
+
+  DisplayLinkMac(ScopedCVDisplayLinkRef display_link);
   virtual ~DisplayLinkMac();
 
   void StartOrContinueDisplayLink();
@@ -42,7 +49,7 @@ class DisplayLinkMac : public base::RefCounted<DisplayLinkMac> {
       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.