athena: Add support for fling-scroll in overview mode.

athena/athena.gyp

 # Copyright 2014 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': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'athena_lib',
       'type': '<(component)',
       'dependencies': [
         '../skia/skia.gyp:skia',
         '../ui/accessibility/accessibility.gyp:ax_gen',
         '../ui/app_list/app_list.gyp:app_list',
         '../ui/aura/aura.gyp:aura',
+        '../ui/events/events.gyp:events_base',
         '../ui/strings/ui_strings.gyp:ui_strings',
         '../ui/views/views.gyp:views',
       ],
       'defines': [
         'ATHENA_IMPLEMENTATION',
       ],
       'sources': [
         # All .cc, .h under athena, except unittests
         'activity/activity.cc',
         'activity/activity_factory.cc',
@@ skipping 129 matching lines @@
         'activity/activity_manager_unittest.cc',
         'home/home_card_unittest.cc',
         'input/accelerator_manager_unittest.cc',
         'screen/screen_manager_unittest.cc',
         'wm/window_manager_unittest.cc',
       ],
     }
   ],
 }