Fix display:none issue for <webview>.

extensions/browser/guest_view/guest_view_manager.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 EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_MANAGER_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_MANAGER_H_
 
 #include <map>
 
 #include "base/gtest_prod_util.h"
@@ skipping 76 matching lines @@
   virtual bool ForEachGuest(content::WebContents* embedder_web_contents,
                             const GuestCallback& callback) OVERRIDE;
  protected:
   friend class GuestViewBase;
   FRIEND_TEST_ALL_PREFIXES(GuestViewManagerTest, AddRemove);
 
   // Can be overriden in tests.
   virtual void AddGuest(int guest_instance_id,
                         content::WebContents* guest_web_contents);
 
-  void RemoveGuest(int guest_instance_id);
+  // Can be overriden in tests.
+  virtual void RemoveGuest(int guest_instance_id);
 
   content::WebContents* GetGuestByInstanceID(int guest_instance_id);
 
   bool CanEmbedderAccessInstanceIDMaybeKill(
       int embedder_render_process_id,
       int guest_instance_id);
 
   bool CanEmbedderAccessInstanceID(int embedder_render_process_id,
                                    int guest_instance_id);
 
@@ skipping 42 matching lines @@
   std::set<int> removed_instance_ids_;
 
   content::BrowserContext* context_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_MANAGER_H_