Unbreak tabs.onRemove extension API in face of fast tab closure

chrome/browser/extensions/browser_event_router.h

 // Copyright (c) 2012 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_EXTENSIONS_BROWSER_EVENT_ROUTER_H_
 #define CHROME_BROWSER_EXTENSIONS_BROWSER_EVENT_ROUTER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 112 matching lines @@
 
   void DispatchSimpleBrowserEvent(Profile* profile,
                                   const int window_id,
                                   const char* event_name);
 
   // Packages |changed_properties| as a tab updated event for the tab |contents|
   // and dispatches the event to the extension.
   void DispatchTabUpdatedEvent(content::WebContents* contents,
                                scoped_ptr<DictionaryValue> changed_properties);
 
+  void DispatchTabDetached(content::WebContents* contents, int index);
+
+  // Send Tab removed event and stop listening for notifications on said
+  // |contents|.
+  void DispatchTabRemovedAndUnregisterNotifications(
+        content::WebContents* contents,
+        int tab_id,
+        bool window_closing);
+
   // Called to dispatch a deprecated style page action click event that was
   // registered like:
   //   chrome.pageActions["name"].addListener(function(actionId, info){})
   void DispatchOldPageActionEvent(Profile* profile,
     const std::string& extension_id,
     const std::string& page_action_id,
     int tab_id,
     const std::string& url,
     int button);
 
@@ skipping 59 matching lines @@
 
   // The main profile that owns this event router.
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserEventRouter);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_BROWSER_EVENT_ROUTER_H_