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

ui/views/controls/combobox/combobox.cc

 // Copyright (c) 2012 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 "ui/views/controls/combobox/combobox.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 12 matching lines @@
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/color_palette.h"
 #include "ui/gfx/scoped_canvas.h"
 #include "ui/gfx/text_utils.h"
 #include "ui/native_theme/common_theme.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/native_theme/native_theme_aura.h"
 #include "ui/resources/grit/ui_resources.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/background.h"
 #include "ui/views/controls/button/custom_button.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/combobox/combobox_listener.h"
 #include "ui/views/controls/focus_ring.h"
 #include "ui/views/controls/focusable_border.h"
 #include "ui/views/controls/menu/menu_config.h"
 #include "ui/views/controls/menu/menu_runner.h"
 #include "ui/views/controls/prefix_selector.h"
 #include "ui/views/controls/textfield/textfield.h"
@@ skipping 100 matching lines @@
   // Overridden from InkDropHost:
   std::unique_ptr<InkDropRipple> CreateInkDropRipple() const override {
     return std::unique_ptr<views::InkDropRipple>(
         new views::FloodFillInkDropRipple(
             GetLocalBounds(), GetInkDropCenterBasedOnLastEvent(),
             GetNativeTheme()->GetSystemColor(
                 ui::NativeTheme::kColorId_LabelEnabledColor),
             ink_drop_visible_opacity()));
   }
 
-  std::unique_ptr<InkDropHighlight> CreateInkDropHighlight() const override {
-    return nullptr;
-  }
-
  private:
   DISALLOW_COPY_AND_ASSIGN(TransparentButton);
 };
 
 // Returns the next or previous valid index (depending on |increment|'s value).
 // Skips separator or disabled indices. Returns -1 if there is no valid adjacent
 // index.
 int GetAdjacentIndex(ui::ComboboxModel* model, int increment, int index) {
   DCHECK(increment == -1 || increment == 1);
 
@@ skipping 827 matching lines @@
   const int kMdPaddingWidth = 8;
   int arrow_pad = UseMd() ? kMdPaddingWidth
                           : PlatformStyle::kComboboxNormalArrowPadding;
   int padding = style_ == STYLE_NORMAL
                     ? arrow_pad * 2
                     : kActionLeftPadding + kActionRightPadding;
   return ArrowSize().width() + padding;
 }
 
 }  // namespace views