[Mac] Bounce app shims when app windows request attention.

chrome/browser/ui/cocoa/apps/native_app_window_cocoa.h

 // Copyright 2013 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 CHROME_BROWSER_UI_COCOA_APPS_NATIVE_APP_WINDOW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_APPS_NATIVE_APP_WINDOW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
@@ skipping 192 matching lines @@
   bool shows_resize_controls_;
   bool shows_fullscreen_controls_;
 
   apps::SizeConstraints size_constraints_;
 
   bool has_frame_color_;
   SkColor active_frame_color_;
   SkColor inactive_frame_color_;
 
   base::scoped_nsobject<NativeAppWindowController> window_controller_;
-  NSInteger attention_request_id_;  // identifier from requestUserAttention
 
   // For system drag, the whole window is draggable and the non-draggable areas
   // have to been explicitly excluded.
   std::vector<extensions::DraggableRegion> draggable_regions_;
 
   // The Extension Command Registry used to determine which keyboard events to
   // handle.
   scoped_ptr<ExtensionKeybindingRegistryCocoa> extension_keybinding_registry_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeAppWindowCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_APPS_NATIVE_APP_WINDOW_COCOA_H_