Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

content/renderer/screen_orientation/screen_orientation_dispatcher.h

Index: content/renderer/screen_orientation/screen_orientation_dispatcher.h
diff --git a/content/renderer/screen_orientation/screen_orientation_dispatcher.h b/content/renderer/screen_orientation/screen_orientation_dispatcher.h
index dc200c15a294706bcc85fe72091b8ee5101c7a3f..fc13aebf59196723f92792f6566cd59aa4e9f425 100644
--- a/content/renderer/screen_orientation/screen_orientation_dispatcher.h
+++ b/content/renderer/screen_orientation/screen_orientation_dispatcher.h
@@ -5,6 +5,8 @@
 #ifndef CONTENT_RENDERER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DISPATCHER_H_
 #define CONTENT_RENDERER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DISPATCHER_H_
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/macros.h"
@@ -40,8 +42,9 @@ class CONTENT_EXPORT ScreenOrientationDispatcher :
   void OnDestruct() override;
 
   // blink::WebScreenOrientationClient implementation.
-  void lockOrientation(blink::WebScreenOrientationLockType orientation,
-                       blink::WebLockOrientationCallback* callback) override;
+  void lockOrientation(
+      blink::WebScreenOrientationLockType orientation,
+      std::unique_ptr<blink::WebLockOrientationCallback> callback) override;
   void unlockOrientation() override;
 
   void OnLockOrientationResult(int request_id,