Use ink drop hover for focus states on toolbar buttons and location

chrome/browser/ui/views/bar_control_button.cc

 // Copyright 2015 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.
 
 #include "chrome/browser/ui/views/bar_control_button.h"
 
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/gfx/vector_icons_public.h"
 #include "ui/views/animation/button_ink_drop_delegate.h"
 #include "ui/views/border.h"
 #include "ui/views/painter.h"
 
 namespace {
 
 // Extra space around the buttons to increase their event target size.
 const int kButtonExtraTouchSize = 4;
 
 }  // namespace
 
 BarControlButton::BarControlButton(views::ButtonListener* listener)
-    : views::ImageButton(listener),
-      id_(gfx::VectorIconId::VECTOR_ICON_NONE),
-      ink_drop_delegate_(new views::ButtonInkDropDelegate(this, this)) {
-  set_ink_drop_delegate(ink_drop_delegate_.get());
+    : views::ImageButton(listener), id_(gfx::VectorIconId::VECTOR_ICON_NONE) {
+  set_ink_drop_delegate(
+      base::WrapUnique(new views::ButtonInkDropDelegate(this, this)));
   set_has_ink_drop_action_on_click(true);
   SetImageAlignment(views::ImageButton::ALIGN_CENTER,
                     views::ImageButton::ALIGN_MIDDLE);
   SetFocusPainter(nullptr);
-  UseMdFocusRing();
 }
 
 BarControlButton::~BarControlButton() {}
 
 void BarControlButton::SetIcon(
     gfx::VectorIconId id,
     const base::Callback<SkColor(void)>& get_text_color_callback) {
   id_ = id;
   get_text_color_callback_ = get_text_color_callback;
 
@@ skipping 10 matching lines @@
   gfx::ImageSkia image = gfx::CreateVectorIcon(id_, icon_color);
   SetImage(views::CustomButton::STATE_NORMAL, &image);
   image = gfx::CreateVectorIcon(id_, SkColorSetA(icon_color, 0xff / 2));
   SetImage(views::CustomButton::STATE_DISABLED, &image);
   set_ink_drop_base_color(icon_color);
 }
 
 void BarControlButton::OnNativeThemeChanged(const ui::NativeTheme* theme) {
   OnThemeChanged();
 }