Improve grammar in some comments.

chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl_unittest.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/chrome_launcher_controller_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 3120 matching lines @@
       app_panel_controller2, app_id, ash::STATUS_RUNNING);
   EXPECT_EQ(panel_index, model_observer_->last_index());
   EXPECT_EQ(1, model_observer_->added());
   model_observer_->clear_counts();
 
   launcher_controller_->CloseLauncherItem(shelf_id2);
   launcher_controller_->CloseLauncherItem(shelf_id1);
   EXPECT_EQ(2, model_observer_->removed());
 }
 
-// Tests that the Gmail extension matches more then the app itself claims with
+// Tests that the Gmail extension matches more than the app itself claims with
 // the manifest file.
 TEST_F(ChromeLauncherControllerImplTest, GmailMatching) {
   InitLauncherControllerWithBrowser();
 
   // Create a Gmail browser tab.
   chrome::NewTab(browser());
   base::string16 title = ASCIIToUTF16("Test");
   NavigateAndCommitActiveTabWithTitle(browser(), GURL(gmail_url), title);
   content::WebContents* content =
       browser()->tab_strip_model()->GetActiveWebContents();
@@ skipping 546 matching lines @@
   EXPECT_FALSE(controller->rotation_locked());
   EXPECT_EQ(display::Display::ROTATE_0,
             display::Screen::GetScreen()->GetPrimaryDisplay().rotation());
 
   NotifyOnTaskOrientationLockRequested(task_id_current_,
                                        OrientationLock::CURRENT);
   EXPECT_TRUE(controller->rotation_locked());
   EXPECT_EQ(display::Display::ROTATE_0,
             display::Screen::GetScreen()->GetPrimaryDisplay().rotation());
 }