Improve grammar in some comments.

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

 // Copyright (c) 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_shortcut_launcher_item_controller.h"
 
 #include <vector>
 
 #include "ash/common/shelf/shelf_model.h"
 #include "ash/shelf/shelf_delegate.h"
@@ skipping 292 matching lines @@
   if (items.size() == 1) {
     // If there is only one suitable browser, we can either activate it, or
     // bounce it (if it is already active).
     if (browser == items[0]) {
       AnimateWindow(browser->window()->GetNativeWindow(),
                     wm::WINDOW_ANIMATION_TYPE_BOUNCE);
       return kNoAction;
     }
     browser = items[0];
   } else {
-    // If there is more then one suitable browser, we advance to the next if
+    // If there is more than one suitable browser, we advance to the next if
     // |browser| is already active - or - check the last used browser if it can
     // be used.
     std::vector<Browser*>::iterator i =
         std::find(items.begin(), items.end(), browser);
     if (i != items.end()) {
       browser = (++i == items.end()) ? items[0] : *i;
     } else {
       browser =
           chrome::FindTabbedBrowser(launcher_controller()->GetProfile(), true);
       if (!browser ||
@@ skipping 40 matching lines @@
         !browser->window()->IsMinimized()) {
       continue;
     }
     if (!IsBrowserRepresentedInBrowserList(browser) &&
         !browser->is_type_tabbed())
       continue;
     active_browsers.push_back(browser);
   }
   return active_browsers;
 }