[Mac] Create CrTrackingArea and use it in TabStripController.

chrome/chrome_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 2501 matching lines @@
         'browser/ui/cocoa/browser_window_factory.mm',
         'browser/ui/cocoa/bubble_view.h',
         'browser/ui/cocoa/bubble_view.mm',
         'browser/ui/cocoa/bug_report_window_controller.h',
         'browser/ui/cocoa/bug_report_window_controller.mm',
         'browser/ui/cocoa/certificate_viewer.mm',
         'browser/ui/cocoa/chrome_browser_window.h',
         'browser/ui/cocoa/chrome_browser_window.mm',
         'browser/ui/cocoa/chrome_event_processing_window.h',
         'browser/ui/cocoa/chrome_event_processing_window.mm',
+        'browser/ui/cocoa/chrome_tracking_area.h',
+        'browser/ui/cocoa/chrome_tracking_area.mm',
         'browser/ui/cocoa/clear_browsing_data_controller.h',
         'browser/ui/cocoa/clear_browsing_data_controller.mm',
         'browser/ui/cocoa/clickhold_button_cell.h',
         'browser/ui/cocoa/clickhold_button_cell.mm',
         'browser/ui/cocoa/command_observer_bridge.h',
         'browser/ui/cocoa/command_observer_bridge.mm',
         'browser/ui/cocoa/confirm_quit_panel_controller.h',
         'browser/ui/cocoa/confirm_quit_panel_controller.mm',
         'browser/ui/cocoa/constrained_html_delegate_mac.mm',
         'browser/ui/cocoa/constrained_window_mac.h',
@@ skipping 2069 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: