Add VectorIconButton functionality to ImageButton.

chrome/browser/ui/views/tabs/tab_strip.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 35 matching lines @@
 //  A View that represents the TabStripModel. The TabStrip has the
 //  following responsibilities:
 //    - It implements the TabStripModelObserver interface, and acts as a
 //      container for Tabs, and is also responsible for creating them.
 //    - It takes part in Tab Drag & Drop with Tab, TabDragHelper and
 //      DraggedTab, focusing on tasks that require reshuffling other tabs
 //      in response to dragged tabs.
 //
 ///////////////////////////////////////////////////////////////////////////////
 class TabStrip : public views::View,
-                 public views::ButtonListener,
+                 public views::ImageButtonDelegate,
                  public views::MouseWatcherListener,
                  public views::ViewTargeterDelegate,
                  public TabController {
  public:
   explicit TabStrip(TabStripController* controller);
   ~TabStrip() override;
 
   // Add and remove observers to changes within this TabStrip.
   void AddObserver(TabStripObserver* observer);
   void RemoveObserver(TabStripObserver* observer);
@@ skipping 465 matching lines @@
   void SwapLayoutIfNecessary();
 
   // Returns true if |touch_layout_| is needed.
   bool NeedsTouchLayout() const;
 
   // Sets the value of |reset_to_shrink_on_exit_|. If true |mouse_watcher_| is
   // used to track when the mouse truly exits the tabstrip and the stacked
   // layout is reset.
   void SetResetToShrinkOnExit(bool value);
 
-  // views::ButtonListener implementation:
+  // views::ImageButtonDelegate:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // View overrides.
   const views::View* GetViewByID(int id) const override;
   bool OnMousePressed(const ui::MouseEvent& event) override;
   bool OnMouseDragged(const ui::MouseEvent& event) override;
   void OnMouseReleased(const ui::MouseEvent& event) override;
   void OnMouseCaptureLost() override;
   void OnMouseMoved(const ui::MouseEvent& event) override;
   void OnMouseEntered(const ui::MouseEvent& event) override;
@@ skipping 91 matching lines @@
   base::OneShotTimer resize_layout_timer_;
 
   // Our observers.
   typedef base::ObserverList<TabStripObserver> TabStripObservers;
   TabStripObservers observers_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStrip);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_