GTK: Implement BlockedPopupContainerView for linux.

chrome/browser/blocked_popup_container.h

 // Copyright (c) 2009 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.
 
 // Defines the public interface for the blocked popup notifications. This
 // interface should only be used by TabContents. Users and subclasses of
 // TabContents should use the appropriate methods on TabContents to access
 // information about blocked popups.
 
 #ifndef CHROME_BROWSER_BLOCKED_POPUP_CONTAINER_H_
@@ skipping 101 matching lines @@
   void CloseAll();
 
   // Sets this object up to delete itself.
   void Destroy();
 
   // Message called when a BlockedPopupContainer should move itself to the
   // bottom right corner of our parent view.
   void RepositionBlockedPopupContainer();
 
   // Returns the TabContents for the blocked popup |index|.
-  TabContents* GetTabContentsAt(size_t index);
+  TabContents* GetTabContentsAt(size_t index) const;
 
   // Returns the names of hosts showing popups.
   std::vector<std::string> GetHosts() const;
 
   // Deletes all local state.
   void ClearData();
 
   // Called to force this container to never show itself again.
   void set_dismissed() { has_been_dismissed_ = true; }
 
@@ skipping 131 matching lines @@
   // Information about all popup hosts.
   PopupHosts popup_hosts_;
 
   // Our platform specific view.
   BlockedPopupContainerView* view_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(BlockedPopupContainer);
 };
 
 #endif  // CHROME_BROWSER_BLOCKED_POPUP_CONTAINER_H_