Change the signature of SetScreenshotDelegate() to show ownership transfer more clearly.

ash/accelerators/accelerator_controller.h

 // Copyright (c) 2012 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 ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_
 #define ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_
 #pragma once
 
 #include <map>
 
@@ skipping 38 matching lines @@
   // is called, and if that handler processes the event (i.e. returns true),
   // this method immediately returns. If not, we do the same thing on the next
   // target, and so on.
   // Returns true if an accelerator was activated.
   bool Process(const ui::Accelerator& accelerator);
 
   // Overridden from ui::AcceleratorTarget:
   virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
   virtual bool CanHandleAccelerators() const OVERRIDE;
 
-  void SetScreenshotDelegate(ScreenshotDelegate* screenshot_delegate);
+  void SetScreenshotDelegate(
+      scoped_ptr<ScreenshotDelegate> screenshot_delegate);
   void SetCapsLockDelegate(scoped_ptr<CapsLockDelegate> caps_lock_delegate);
 
  private:
   // Initialize the accelerators this class handles as a target.
   void Init();
 
   scoped_ptr<ui::AcceleratorManager> accelerator_manager_;
 
   scoped_ptr<ScreenshotDelegate> screenshot_delegate_;
   scoped_ptr<CapsLockDelegate> caps_lock_delegate_;
 
   // A map from accelerators to the AcceleratorAction values, which are used in
   // the implementation.
   std::map<ui::Accelerator, int> accelerators_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratorController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_