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

ui/views/animation/square_ink_drop_ripple.cc

Index: ui/views/animation/square_ink_drop_ripple.cc
diff --git a/ui/views/animation/square_ink_drop_ripple.cc b/ui/views/animation/square_ink_drop_ripple.cc
index 58585a2ca9c097e3105a709aa70120e605b0b3e3..ffa339e3f815beab4c1e24418b6972a00ae508f7 100644
--- a/ui/views/animation/square_ink_drop_ripple.cc
+++ b/ui/views/animation/square_ink_drop_ripple.cc
@@ -232,10 +232,6 @@ ui::Layer* SquareInkDropRipple::GetRootLayer() {
   return &root_layer_;
 }
 
-bool SquareInkDropRipple::OverridesHighlight() const {
-  return true;
-}
-
 float SquareInkDropRipple::GetCurrentOpacity() const {
   return root_layer_.opacity();
 }