Added material design mouse hover feedback support.

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',
       'accessibility/native_view_accessibility_win.cc',
       'accessibility/native_view_accessibility_win.h',
       'accessible_pane_view.cc',
       'accessible_pane_view.h',
       'animation/bounds_animator.cc',
       'animation/bounds_animator.h',
       'animation/button_ink_drop_delegate.cc',
       'animation/button_ink_drop_delegate.h',
       'animation/ink_drop_animation.cc',
       'animation/ink_drop_animation.h',
       'animation/ink_drop_animation_controller.h',
       'animation/ink_drop_animation_controller_factory.cc',
       'animation/ink_drop_animation_controller_factory.h',
       'animation/ink_drop_animation_controller_impl.cc',
       'animation/ink_drop_animation_controller_impl.h',
       'animation/ink_drop_animation_observer.cc',
       'animation/ink_drop_animation_observer.h',
       'animation/ink_drop_delegate.h',
       'animation/ink_drop_host.h',
+      'animation/ink_drop_hover.cc',
+      'animation/ink_drop_hover.h',
       'animation/ink_drop_painted_layer_delegates.cc',
       'animation/ink_drop_painted_layer_delegates.h',
       'animation/ink_drop_state.cc',
       'animation/ink_drop_state.h',
       'animation/scroll_animator.cc',
       'animation/scroll_animator.h',
       'background.cc',
       'background.h',
       'border.cc',
       'border.h',
@@ skipping 497 matching lines @@
       'test/desktop_screen_x11_test_api.cc',
       'test/ui_controls_factory_desktop_aurax11.cc',
       'test/ui_controls_factory_desktop_aurax11.h',
     ],
     'views_unittests_sources': [
       'accessibility/native_view_accessibility_unittest.cc',
       'accessibility/native_view_accessibility_win_unittest.cc',
       'accessible_pane_view_unittest.cc',
       'animation/bounds_animator_unittest.cc',
       'animation/ink_drop_animation_controller_factory_unittest.cc',
+      'animation/ink_drop_animation_controller_impl_unittest.cc',
       'animation/ink_drop_animation_unittest.cc',
+      'animation/ink_drop_hover_unittest.cc',
       'bubble/bubble_border_unittest.cc',
       'bubble/bubble_delegate_unittest.cc',
       'bubble/bubble_frame_view_unittest.cc',
       'bubble/bubble_window_targeter_unittest.cc',
       'cocoa/bridged_native_widget_unittest.mm',
       'cocoa/cocoa_mouse_capture_unittest.mm',
       'controls/button/blue_button_unittest.cc',
       'controls/button/custom_button_unittest.cc',
       'controls/button/image_button_unittest.cc',
       'controls/button/label_button_unittest.cc',
@@ skipping 420 matching lines @@
                 '../aura/aura.gyp:aura',
                 '../wm/wm.gyp:wm',
               ],
             }],
           ],
         },  # target_name: macviews_interactive_ui_tests
       ],  # targets
     }],
   ],  # conditions
 }