Add a Material Design Circular Activity Indicator (Spinner) view for Mac.

chrome/chrome_tests_unit.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_unit_tests_sources': [
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
       '../components/autofill/content/renderer/test_password_generation_agent.h',
@@ skipping 365 matching lines @@
       'browser/ui/cocoa/bookmarks/bookmark_sync_promo_controller_unittest.mm',
       'browser/ui/cocoa/bookmarks/bookmark_tree_browser_cell_unittest.mm',
       'browser/ui/cocoa/browser/edit_search_engine_cocoa_controller_unittest.mm',
       'browser/ui/cocoa/browser/zoom_bubble_controller_unittest.mm',
       'browser/ui/cocoa/browser_window_cocoa_unittest.mm',
       'browser/ui/cocoa/browser_window_controller_unittest.mm',
       'browser/ui/cocoa/browser_window_layout_unittest.mm',
       'browser/ui/cocoa/bubble_view_unittest.mm',
       'browser/ui/cocoa/chrome_browser_window_unittest.mm',
       'browser/ui/cocoa/chrome_event_processing_window_unittest.mm',
+      'browser/ui/cocoa/circular_activity_indicator_view_unittest.mm',
       'browser/ui/cocoa/clickhold_button_cell_unittest.mm',
       'browser/ui/cocoa/cocoa_profile_test.h',
       'browser/ui/cocoa/cocoa_profile_test.mm',
       'browser/ui/cocoa/cocoa_test_helper.h',
       'browser/ui/cocoa/cocoa_test_helper.mm',
       'browser/ui/cocoa/command_observer_bridge_unittest.mm',
       'browser/ui/cocoa/confirm_bubble_controller_unittest.mm',
       'browser/ui/cocoa/confirm_quit_panel_controller_unittest.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_alert_unittest.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_animation_unittest.mm',
@@ skipping 2393 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }