Support targeting for gestures in ViewTargeter

ui/views/views.gyp

 # Copyright (c) 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': {
     'chromium_code': 1,
     # Sources lists shared with GN build.
     'views_sources': [
       'accessibility/native_view_accessibility.cc',
       'accessibility/native_view_accessibility.h',
@@ skipping 274 matching lines @@
       'views_switches.h',
       'views_delegate.cc',
       'views_delegate.h',
       'views_touch_selection_controller_factory.h',
       'views_touch_selection_controller_factory_aura.cc',
       'views_touch_selection_controller_factory_mac.cc',
       'widget/drop_helper.cc',
       'widget/drop_helper.h',
       'widget/root_view.cc',
       'widget/root_view.h',
+      'widget/root_view_targeter.cc',
+      'widget/root_view_targeter.h',
       'widget/monitor_win.cc',
       'widget/monitor_win.h',
       'widget/native_widget.h',
       'widget/native_widget_aura.cc',
       'widget/native_widget_aura.h',
       'widget/native_widget_delegate.h',
       'widget/native_widget_mac.h',
       'widget/native_widget_mac.mm',
       'widget/native_widget_private.h',
       'widget/tooltip_manager_aura.cc',
@@ skipping 564 matching lines @@
                 '../aura/aura.gyp:aura',
                 '../wm/wm.gyp:wm',
               ],
             }],
           ],
         },  # target_name: macviews_interactive_ui_tests
       ],  # targets
     }],
   ],  # conditions
 }