Reland 1: "mac: Allow Chrome to hand off its active URL to other devices."

chrome/chrome_browser_ui.gypi

 # Copyright 2012 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.
 
 {
   'variables': {
     'chrome_browser_ui_non_ios_sources': [
       'browser/ui/accelerator_utils.h',
       'browser/ui/android/android_about_app_info.cc',
       'browser/ui/android/android_about_app_info.h',
@@ skipping 447 matching lines @@
       'browser/ui/cocoa/fullscreen_exit_bubble_view.h',
       'browser/ui/cocoa/fullscreen_exit_bubble_view.mm',
       'browser/ui/cocoa/fullscreen_window.h',
       'browser/ui/cocoa/fullscreen_window.mm',
       'browser/ui/cocoa/full_size_content_window.h',
       'browser/ui/cocoa/full_size_content_window.mm',
       'browser/ui/cocoa/global_error_bubble_controller.h',
       'browser/ui/cocoa/global_error_bubble_controller.mm',
       'browser/ui/cocoa/gradient_button_cell.h',
       'browser/ui/cocoa/gradient_button_cell.mm',
+      'browser/ui/cocoa/handoff_active_url_observer.cc',
+      'browser/ui/cocoa/handoff_active_url_observer.h',
+      'browser/ui/cocoa/handoff_active_url_observer_bridge.h',
+      'browser/ui/cocoa/handoff_active_url_observer_bridge.mm',
+      'browser/ui/cocoa/handoff_active_url_observer_delegate.h',
       'browser/ui/cocoa/history_menu_bridge.h',
       'browser/ui/cocoa/history_menu_bridge.mm',
       'browser/ui/cocoa/history_menu_cocoa_controller.h',
       'browser/ui/cocoa/history_menu_cocoa_controller.mm',
       'browser/ui/cocoa/history_overlay_controller.h',
       'browser/ui/cocoa/history_overlay_controller.mm',
       'browser/ui/cocoa/hover_close_button.h',
       'browser/ui/cocoa/hover_close_button.mm',
       'browser/ui/cocoa/hung_renderer_controller.h',
       'browser/ui/cocoa/hung_renderer_controller.mm',
@@ skipping 2615 matching lines @@
         ['OS!="android" and OS!="ios"', {
           'dependencies': [
             '../device/bluetooth/bluetooth.gyp:device_bluetooth',
           ],
           'sources': [ '<@(chrome_browser_ui_non_mobile_sources)' ],
         }],
       ],
     },
   ],
 }