Reduce calling count of UpdateAppState()

chrome/browser/ui/ash/launcher/browser_status_monitor.cc

 // Copyright 2013 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/ash/launcher/browser_status_monitor.h"
 
 #include "ash/shell.h"
 #include "ash/wm/window_util.h"
 #include "chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
@@ skipping 152 matching lines @@
                                          int index) {
   launcher_controller_->UpdateAppState(
       contents, ChromeLauncherController::APP_STATE_REMOVED);
   UpdateBrowserItemState();
 }
 
 void BrowserStatusMonitor::TabChangedAt(
     content::WebContents* contents,
     int index,
     TabStripModelObserver::TabChangeType change_type) {
-  UpdateAppAndBrowserState(contents);
+  if (change_type == TabStripModelObserver::URL_CHANGING_ONLY)
+    UpdateAppAndBrowserState(contents);
 }
 
 void BrowserStatusMonitor::TabReplacedAt(TabStripModel* tab_strip_model,
                                          content::WebContents* old_contents,
                                          content::WebContents* new_contents,
                                          int index) {
   launcher_controller_->UpdateAppState(
       old_contents,
       ChromeLauncherController::APP_STATE_REMOVED);
   UpdateAppAndBrowserState(new_contents);
@@ skipping 15 matching lines @@
 
     launcher_controller_->UpdateAppState(contents, app_state);
   }
   UpdateBrowserItemState();
 }
 
 void BrowserStatusMonitor::UpdateBrowserItemState() {
   launcher_controller_->GetBrowserShortcutLauncherItemController()->
       UpdateBrowserItemState();
 }