Let Chrome app handle Ash accelerators first if the app is launched as a window

ash/shell/shell_delegate_impl.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_SHELL_DELEGATE_IMPL_H_
 #define ASH_SHELL_SHELL_DELEGATE_IMPL_H_
 #pragma once
 
 #include "ash/shell_delegate.h"
 #include "base/compiler_specific.h"
@@ skipping 11 matching lines @@
 
   void SetWatcher(WindowWatcher* watcher);
 
   virtual bool IsUserLoggedIn() OVERRIDE;
   virtual void LockScreen() OVERRIDE;
   virtual void UnlockScreen() OVERRIDE;
   virtual bool IsScreenLocked() const OVERRIDE;
   virtual void Shutdown() OVERRIDE;
   virtual void Exit() OVERRIDE;
   virtual void NewWindow(bool incognito) OVERRIDE;
+  virtual bool IsBrowserWindow(const aura::Window* window) OVERRIDE;
   virtual void Search() OVERRIDE;
   virtual void OpenFileManager() OVERRIDE;
   virtual void OpenCrosh() OVERRIDE;
   virtual void OpenMobileSetup() OVERRIDE;
   virtual ash::AppListViewDelegate* CreateAppListViewDelegate() OVERRIDE;
   virtual void StartPartialScreenshot(
       ash::ScreenshotDelegate* screenshot_delegate) OVERRIDE;
   virtual ash::LauncherDelegate* CreateLauncherDelegate(
       ash::LauncherModel* model) OVERRIDE;
   virtual ash::SystemTrayDelegate* CreateSystemTrayDelegate(
       ash::SystemTray* tray) OVERRIDE;
   virtual ash::UserWallpaperDelegate* CreateUserWallpaperDelegate() OVERRIDE;
 
  private:
   // Used to update Launcher. Owned by main.
   WindowWatcher* watcher_;
 
   LauncherDelegateImpl* launcher_delegate_;
 
   bool locked_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellDelegateImpl);
 };
 
 }  // namespace shell
 }  // namespace ash
 
 #endif  // ASH_SHELL_SHELL_DELEGATE_IMPL_H_