[ash-md] Added different highlighting modes to the InkDropImpl.

ui/views/animation/flood_fill_ink_drop_ripple.cc

Index: ui/views/animation/flood_fill_ink_drop_ripple.cc
diff --git a/ui/views/animation/flood_fill_ink_drop_ripple.cc b/ui/views/animation/flood_fill_ink_drop_ripple.cc
index e69de79a2ef86a8e4e4772339883908c0732b5f2..f11bfd53d6cbe139e6ae246d7c9b1be9f4ce39f7 100644
--- a/ui/views/animation/flood_fill_ink_drop_ripple.cc
+++ b/ui/views/animation/flood_fill_ink_drop_ripple.cc
@@ -153,10 +153,6 @@ ui::Layer* FloodFillInkDropRipple::GetRootLayer() {
   return &root_layer_;
 }
 
-bool FloodFillInkDropRipple::OverridesHighlight() const {
-  return false;
-}
-
 void FloodFillInkDropRipple::AnimateStateChange(
     InkDropState old_ink_drop_state,
     InkDropState new_ink_drop_state,