Add MD ink drop ripple to shelf app items

ash/shelf/app_list_button.cc

 // Copyright 2014 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 "ash/shelf/app_list_button.h"
 
 #include "ash/common/ash_constants.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/shelf/wm_shelf_util.h"
+#include "ash/shelf/ink_drop_button_listener.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_view.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/app_list/app_list_switches.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_switches_util.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/gfx/vector_icons_public.h"
 #include "ui/views/painter.h"
 
 namespace ash {
 
 // Radius of the app list button circular background.
 const int kAppListButtonBackgroundRadius = 16;
 
-AppListButton::AppListButton(ShelfView* shelf_view)
-    : views::ImageButton(shelf_view),
+AppListButton::AppListButton(InkDropButtonListener* listener,
+                             ShelfView* shelf_view)
+    : views::ImageButton(nullptr),
       draw_background_as_active_(false),
+      listener_(listener),
       shelf_view_(shelf_view) {
   SetAccessibleName(
       app_list::switches::IsExperimentalAppListEnabled()
           ? l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_LAUNCHER_TITLE)
           : l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_TITLE));
   SetSize(
       gfx::Size(GetShelfConstant(SHELF_SIZE), GetShelfConstant(SHELF_SIZE)));
   SetFocusPainter(views::Painter::CreateSolidFocusPainter(
                       kFocusBorderColor, gfx::Insets(1, 1, 1, 1)));
   set_notify_action(CustomButton::NOTIFY_ON_PRESS);
@@ skipping 183 matching lines @@
                (background_bounds.height() - foreground_bounds.height()) / 2));
   canvas->DrawImageInt(foreground_image, foreground_bounds.x(),
                        foreground_bounds.y());
 }
 
 void AppListButton::GetAccessibleState(ui::AXViewState* state) {
   state->role = ui::AX_ROLE_BUTTON;
   state->name = shelf_view_->GetTitleForView(this);
 }
 
+void AppListButton::NotifyClick(const ui::Event& event) {
+  ImageButton::NotifyClick(event);
+  if (listener_)
+    listener_->ButtonPressed(this, event, ink_drop());
+}
+
 void AppListButton::SetDrawBackgroundAsActive(
     bool draw_background_as_active) {
   if (draw_background_as_active_ == draw_background_as_active)
     return;
   draw_background_as_active_ = draw_background_as_active;
   SchedulePaint();
 }
 
 }  // namespace ash