[Mac] Update fullscreen state when window is fullscreened natively.

apps/app_window.h

 // Copyright 2014 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 APPS_APP_WINDOW_H_
 #define APPS_APP_WINDOW_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/extension_icon_image.h"
@@ skipping 319 matching lines @@
   void Show(ShowType show_type);
 
   // Hides the window. If the window was previously flagged to be shown on
   // first paint, it will be unflagged.
   void Hide();
 
   AppWindowContents* app_window_contents_for_test() {
     return app_window_contents_.get();
   }
 
+  int fullscreen_types_for_test() {
+    return fullscreen_types_;
+  }
+
   // Set whether the window should stay above other windows which are not
   // configured to be always-on-top.
   void SetAlwaysOnTop(bool always_on_top);
 
   // Whether the always-on-top property has been set by the chrome.app.window
   // API. Note that the actual value of this property in the native app window
   // may be false if the bit is silently switched off for security reasons.
   bool IsAlwaysOnTop() const;
 
   // Retrieve the current state of the app window as a dictionary, to pass to
@@ skipping 177 matching lines @@
   // reinstated when the window exits fullscreen and moves away from the
   // taskbar.
   bool cached_always_on_top_;
 
   DISALLOW_COPY_AND_ASSIGN(AppWindow);
 };
 
 }  // namespace apps
 
 #endif  // APPS_APP_WINDOW_H_