Implement fullscreen info bubble on Win and Mac

chrome/browser/ui/cocoa/info_bubble_window.h

 // Copyright (c) 2011 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/chrome_event_processing_window.h"
 
 class AppNotificationBridge;
 
 // A rounded window with an arrow used for example when you click on the STAR
 // button or that pops up within our first-run UI.
 @interface InfoBubbleWindow : ChromeEventProcessingWindow {
  @private
   // Is self in the process of closing.
   BOOL closing_;
   // If NO the window will close immediately instead of fading out.
   // Default YES.
   BOOL delayOnClose_;
+  // If NO the window will never become key.
+  // Default YES.
+  BOOL canBecomeKey_;
   // Bridge to proxy Chrome notifications to the window.
   scoped_ptr<AppNotificationBridge> notificationBridge_;
 }
 
 @property(nonatomic) BOOL delayOnClose;
+@property(nonatomic) BOOL canBecomeKey;
 
 // Returns YES if the window is in the process of closing.
 // Can't use "windowWillClose" notification because that will be sent
 // after the closing animation has completed.
 - (BOOL)isClosing;
 
 @end