Adding a menu item to take a screenshot under "More Tools" submenu in the Wrench menu.

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_
 
 #include <map>
 #include <set>
 
@@ skipping 93 matching lines @@
 
   void SetBrightnessControlDelegate(
       scoped_ptr<BrightnessControlDelegate> brightness_control_delegate);
   void SetImeControlDelegate(
       scoped_ptr<ImeControlDelegate> ime_control_delegate);
   void SetScreenshotDelegate(
       scoped_ptr<ScreenshotDelegate> screenshot_delegate);
   BrightnessControlDelegate* brightness_control_delegate() const {
     return brightness_control_delegate_.get();
   }
+  ScreenshotDelegate* screenshot_delegate() const {

[sky, 2014/01/10 00:02:52]

Generally you want const methods to return const objects. Otherwise you can
often circumvent the const'ness. Make this non-const.

[mfomitchev, 2014/01/10 18:06:50]

Done.

+    return screenshot_delegate_.get();
+  }
 
   // Provides access to an object holding contextual information.
   AcceleratorControllerContext* context() {
     return &context_;
   }
 
   // Provides access to the ExitWarningHandler for testing.
   ExitWarningHandler* GetExitWarningHandlerForTest() {
     return &exit_warning_handler_;
   }
@@ skipping 47 matching lines @@
   std::set<int> actions_allowed_in_app_mode_;
   // Actions disallowed if there are no windows.
   std::set<int> actions_needing_window_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratorController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_