Multi-tab: Adding new Notification when tab selection changes (again).

chrome/browser/extensions/extension_browser_event_router.cc

 // Copyright (c) 2011 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/extensions/extension_browser_event_router.h"
 
 #include "base/json/json_writer.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_event_names.h"
 #include "chrome/browser/extensions/extension_event_router.h"
@@ skipping 285 matching lines @@
   DCHECK_GT(removed_count, 0);
 
   UnregisterForTabNotifications(contents->tab_contents());
 }
 
 void ExtensionBrowserEventRouter::ActiveTabChanged(
     TabContentsWrapper* old_contents,
     TabContentsWrapper* new_contents,
     int index,
     bool user_gesture) {
-  if (old_contents == new_contents)
-    return;
-
   ListValue args;
   args.Append(Value::CreateIntegerValue(
       ExtensionTabUtil::GetTabId(new_contents->tab_contents())));
 
   DictionaryValue* object_args = new DictionaryValue();
   object_args->Set(tab_keys::kWindowIdKey, Value::CreateIntegerValue(
       ExtensionTabUtil::GetWindowIdOfTab(new_contents->tab_contents())));
   args.Append(object_args);
 
   std::string json_args;
@@ skipping 231 matching lines @@
 
 void ExtensionBrowserEventRouter::BrowserActionExecuted(
     Profile* profile, const std::string& extension_id, Browser* browser) {
   TabContentsWrapper* tab_contents = NULL;
   int tab_id = 0;
   if (!ExtensionTabUtil::GetDefaultTab(browser, &tab_contents, &tab_id))
     return;
   DispatchEventWithTab(profile, extension_id, "browserAction.onClicked",
                        tab_contents->tab_contents(), true);
 }