Multi-tab: Adding new Notification when tab selection changes.

chrome/browser/ui/browser.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/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <shellapi.h>
 #include <windows.h>
 #endif  // OS_WIN
@@ skipping 2892 matching lines @@
 
   // Save what the user's currently typing, so it can be restored when we
   // switch back to this tab.
   window_->GetLocationBar()->SaveStateToContents(contents->tab_contents());
 }
 
 void Browser::ActiveTabChanged(TabContentsWrapper* old_contents,
                                TabContentsWrapper* new_contents,
                                int index,
                                bool user_gesture) {
-  if (old_contents == new_contents)
-    return;
-
   // On some platforms we want to automatically reload tabs that are
   // killed when the user selects them.
   if (user_gesture && new_contents->tab_contents()->crashed_status() ==
         base::TERMINATION_STATUS_PROCESS_WAS_KILLED) {
     const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess();
     if (parsed_command_line.HasSwitch(switches::kReloadKilledTabs)) {
       Reload(CURRENT_TAB);
       return;
     }
   }
@@ skipping 1784 matching lines @@
   TabContents* current_tab = GetSelectedTabContents();
   if (current_tab) {
     content_restrictions = current_tab->content_restrictions();
     NavigationEntry* active_entry = current_tab->controller().GetActiveEntry();
     // See comment in UpdateCommandsForTabState about why we call url().
     if (!SavePackage::IsSavableURL(active_entry ? active_entry->url() : GURL()))
       content_restrictions |= CONTENT_RESTRICTION_SAVE;
   }
   return content_restrictions;
 }