Add VectorIconButton functionality to ImageButton.

ui/views/controls/button/vector_icon_button.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_VECTOR_ICON_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_VECTOR_ICON_BUTTON_H_
 
 #include "base/macros.h"
 #include "ui/views/controls/button/image_button.h"
 
 namespace gfx {
 struct VectorIcon;
 enum class VectorIconId;
 }
 
 namespace views {
 
 class VectorIconButtonDelegate;
 
-// A button that has an image and no text, with the image defined by a vector
-// icon identifier.
+// A button that has a image from a vector icon and no text.
 class VIEWS_EXPORT VectorIconButton : public views::ImageButton {
  public:
   explicit VectorIconButton(VectorIconButtonDelegate* delegate);
   ~VectorIconButton() override;
 
-  // Sets the icon to display and provides a callback which should return the
-  // text color from which to derive this icon's color. The one that takes an ID
-  // is deprecated and should be removed when all vector icons are identified by
-  // VectorIcon structs.
-  void SetIcon(gfx::VectorIconId id);
+  // Sets the icon to display.
   void SetIcon(const gfx::VectorIcon& icon);
 
   // views::ImageButton:
   void OnThemeChanged() override;
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
 
  private:
-  // Performs the work common to both SetIcon() variants.
-  void OnSetIcon();
-
   // Called when something may have affected the button's images or colors.
   void UpdateImagesAndColors();
 
   VectorIconButtonDelegate* delegate_;
-  // TODO(estade): remove |id_| in favor of |icon_| once all callers have been
-  // updated.
-  gfx::VectorIconId id_;
   const gfx::VectorIcon* icon_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(VectorIconButton);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_VECTOR_ICON_BUTTON_H_