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

ash/common/system/tray/system_menu_button.cc

Index: ash/common/system/tray/system_menu_button.cc
diff --git a/ash/common/system/tray/system_menu_button.cc b/ash/common/system/tray/system_menu_button.cc
index 5931b24ecf99bf9a96afd8bb4b431b79d91e120a..c4d12ff0d0e83906ce1a8c4bfa96a0ac1cb942e0 100644
--- a/ash/common/system/tray/system_menu_button.cc
+++ b/ash/common/system/tray/system_menu_button.cc
@@ -11,6 +11,7 @@
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/views/animation/flood_fill_ink_drop_ripple.h"
 #include "ui/views/animation/ink_drop_highlight.h"
+#include "ui/views/animation/ink_drop_impl.h"
 #include "ui/views/animation/square_ink_drop_ripple.h"
 #include "ui/views/border.h"
 #include "ui/views/painter.h"
@@ -50,6 +51,13 @@ SystemMenuButton::SystemMenuButton(views::ButtonListener* listener,
 
 SystemMenuButton::~SystemMenuButton() {}
 
+std::unique_ptr<views::InkDrop> SystemMenuButton::CreateInkDrop() {
+  std::unique_ptr<views::InkDropImpl> ink_drop =
+      CreateDefaultFloodFillInkDropImpl();
+  ink_drop->SetShowHighlightOnHover(false);
+  return std::move(ink_drop);
+}
+
 std::unique_ptr<views::InkDropRipple> SystemMenuButton::CreateInkDropRipple()
     const {
   const gfx::Size size = GetInkDropSize();
@@ -73,11 +81,6 @@ std::unique_ptr<views::InkDropRipple> SystemMenuButton::CreateInkDropRipple()
 
 std::unique_ptr<views::InkDropHighlight>
 SystemMenuButton::CreateInkDropHighlight() const {
-  // TODO(bruthig): Show the highlight when the ink drop is active. (See
-  // crbug.com/649734)
-  if (!ShouldShowInkDropHighlight())
-    return nullptr;
-
   int highlight_radius = 0;
   switch (ink_drop_style_) {
     case InkDropStyle::SQUARE:
@@ -96,10 +99,6 @@ SystemMenuButton::CreateInkDropHighlight() const {
   return highlight;
 }
 
-bool SystemMenuButton::ShouldShowInkDropHighlight() const {
-  return false;
-}
-
 gfx::Size SystemMenuButton::GetInkDropSize() const {
   gfx::Rect bounds = GetLocalBounds();
   bounds.Inset(kTrayPopupInkDropInset, kTrayPopupInkDropInset);