Remove some more OS_CHROMEOS from browser.

ash/shell_delegate.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_SHELL_DELEGATE_H_
 #define ASH_SHELL_DELEGATE_H_
 #pragma once
 
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "ash/shell.h"
 #include "base/callback.h"
 #include "base/string16.h"
 
 namespace app_list {
 class AppListViewDelegate;
 }
 
 namespace aura {
 class Window;
 }
 
+namespace ui {
+class AcceleratorTarget;
+}
+
 namespace views {
 class Widget;
 }
 
 namespace ash {
 
 class LauncherDelegate;
 class LauncherModel;
 struct LauncherItem;
 class ScreenshotDelegate;
@@ skipping 33 matching lines @@
 
   // Invoked when the user uses Ctrl-M to open file manager.
   virtual void OpenFileManager() = 0;
 
   // Invoked when the user opens Crosh.
   virtual void OpenCrosh() = 0;
 
   // Invoked when the user needs to set up mobile networking.
   virtual void OpenMobileSetup() = 0;
 
+  // Shows the keyboard shortcut overlay.
+  virtual void ShowKeyboardOverlay(ui::AcceleratorTarget* target) = 0;
+
   // Get the current browser context. This will get us the current profile.
   virtual content::BrowserContext* GetCurrentBrowserContext() = 0;
 
   // Invoked when the user presses a shortcut to toggle spoken feedback
   // for accessibility.
   virtual void ToggleSpokenFeedback() = 0;
 
   // Invoked to create an AppListViewDelegate. Shell takes the ownership of
   // the created delegate.
   virtual app_list::AppListViewDelegate* CreateAppListViewDelegate() = 0;
@@ skipping 10 matching lines @@
   // Creates a system-tray delegate. Shell takes ownership of the delegate.
   virtual SystemTrayDelegate* CreateSystemTrayDelegate(SystemTray* tray) = 0;
 
   // Creates a user wallpaper delegate. Shell takes ownership of the delegate.
   virtual UserWallpaperDelegate* CreateUserWallpaperDelegate() = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_DELEGATE_H_