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

chrome/browser/automation/automation_provider_observers.cc

 // 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.
 
 #include "chrome/browser/automation/automation_provider_observers.h"
 
 #include <deque>
 #include <string>
 #include <vector>
 
@@ skipping 477 matching lines @@
   tab_strip_model_->RemoveObserver(this);
 }
 
 void TabCountChangeObserver::TabInsertedAt(WebContents* contents,
                                            int index,
                                            bool foreground) {
   CheckTabCount();
 }
 
 void TabCountChangeObserver::TabDetachedAt(WebContents* contents,
-                                           int index) {
+                                           int index,
+                                           bool closing_all) {
   CheckTabCount();
 }
 
 void TabCountChangeObserver::TabStripModelDeleted() {
   if (automation_.get()) {
     AutomationMsg_WaitForTabCountToBecome::WriteReplyParams(
         reply_message_.get(), false);
     automation_->Send(reply_message_.release());
   }
 
@@ skipping 2144 matching lines @@
       if (automation_.get()) {
         AutomationJSONReply(automation_.get(), reply_message_.release())
             .SendSuccess(NULL);
       }
       delete this;
     }
   } else {
     NOTREACHED();
   }
 }