Get rid of some lingering MD-specific raster assets.

chrome/browser/ui/views/toolbar/chevron_menu_button.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_VIEWS_TOOLBAR_CHEVRON_MENU_BUTTON_H_
-#define CHROME_BROWSER_UI_VIEWS_TOOLBAR_CHEVRON_MENU_BUTTON_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "ui/views/controls/button/menu_button.h"
-#include "ui/views/controls/button/menu_button_listener.h"
-
-class BrowserActionsContainer;
-
-// The MenuButton for the chevron in the extension toolbar, which is also
-// responsible for showing the legacy (drop-down) overflow menu.
-class ChevronMenuButton : public views::MenuButton,
-                          public views::MenuButtonListener {
- public:
-  explicit ChevronMenuButton(
-      BrowserActionsContainer* browser_actions_container);
-  ~ChevronMenuButton() override;
-
-  // Closes the overflow menu (and any context menu), if it is open.
-  void CloseMenu();
-
- private:
-  class MenuController;
-
-  // views::MenuButton:
-  std::unique_ptr<views::LabelButtonBorder> CreateDefaultBorder()
-      const override;
-  bool GetDropFormats(
-      int* formats,
-      std::set<ui::Clipboard::FormatType>* format_types) override;
-  bool AreDropTypesRequired() override;
-  bool CanDrop(const ui::OSExchangeData& data) override;
-  void OnDragEntered(const ui::DropTargetEvent& event) override;
-  int OnDragUpdated(const ui::DropTargetEvent& event) override;
-  void OnDragExited() override;
-  int OnPerformDrop(const ui::DropTargetEvent& event) override;
-
-  // views::MenuButtonListener:
-  void OnMenuButtonClicked(views::MenuButton* source,
-                           const gfx::Point& point,
-                           const ui::Event* event) override;
-
-  // Shows the overflow menu.
-  void ShowOverflowMenu(bool for_drop);
-
-  // Called by the overflow menu when all the work is done.
-  void MenuDone();
-
-  // The owning BrowserActionsContainer.
-  BrowserActionsContainer* browser_actions_container_;
-
-  // The overflow menu controller.
-  std::unique_ptr<MenuController> menu_controller_;
-
-  base::WeakPtrFactory<ChevronMenuButton> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChevronMenuButton);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_CHEVRON_MENU_BUTTON_H_