Added material design mouse hover feedback support.

ui/views/views.gyp

Index: ui/views/views.gyp
diff --git a/ui/views/views.gyp b/ui/views/views.gyp
index e678ff90d6df4e783ea44568592bc71ad93f3e3f..844a51a059c79c21be327d957b18f4684613dc26 100644
--- a/ui/views/views.gyp
+++ b/ui/views/views.gyp
@@ -23,7 +23,10 @@
       'animation/ink_drop_animation_controller_impl.h',
       'animation/ink_drop_animation_observer.cc',
       'animation/ink_drop_animation_observer.h',
+      'animation/ink_drop_consumer.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',
@@ -477,6 +480,8 @@
     'views_test_support_sources': [
       'animation/test/ink_drop_animation_test_api.cc',
       'animation/test/ink_drop_animation_test_api.h',
+      'animation/test/test_ink_drop_consumer.cc',
+      'animation/test/test_ink_drop_consumer.h',
       'animation/test/test_ink_drop_host.cc',
       'animation/test/test_ink_drop_host.h',
       'controls/textfield/textfield_test_api.cc',
@@ -535,6 +540,7 @@
       'animation/bounds_animator_unittest.cc',
       'animation/ink_drop_animation_controller_factory_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',