Do not use assets for Ash window control button backgrounds

ash/frame/caption_buttons/frame_caption_button_container_view.h

 // Copyright 2013 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 ASH_FRAME_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_CONTAINER_VIEW_H_
 #define ASH_FRAME_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_CONTAINER_VIEW_H_
 
 #include <map>
 
 #include "ash/ash_export.h"
@@ skipping 46 matching lines @@
     FrameCaptionButton* close_button() const {
       return container_view_->close_button_;
     }
 
    private:
     FrameCaptionButtonContainerView* container_view_;
 
     DISALLOW_COPY_AND_ASSIGN(TestApi);
   };
 
-  // Sets the resource ids of the images to paint the button for |icon|. The
-  // FrameCaptionButtonContainerView will keep track of the images to use for
+  // Sets the resource id of the image to paint the button for |icon|. The
+  // FrameCaptionButtonContainerView will keep track of the image to use for
   // |icon| even if none of the buttons currently use |icon|.
-  void SetButtonImages(CaptionButtonIcon icon,
-                       int icon_image_id,
-                       int hovered_background_image_id,
-                       int pressed_background_image_id);
+  void SetButtonImage(CaptionButtonIcon icon, int icon_image_id);
 
   // Sets whether the buttons should be painted as active. Does not schedule
   // a repaint.
   void SetPaintAsActive(bool paint_as_active);
 
   // Tell the window controls to reset themselves to the normal state.
   void ResetWindowControls();
 
   // Determines the window HT* code for the caption button at |point|. Returns
   // HTNOWHERE if |point| is not over any of the caption buttons. |point| must
   // be in the coordinates of the FrameCaptionButtonContainerView.
   int NonClientHitTest(const gfx::Point& point) const;
 
   // Updates the size button's visibility based on whether |frame_| can be
   // maximized and if maximize mode is enabled. A parent view should relayout
   // to reflect the change in visibility.
   void UpdateSizeButtonVisibility();
 
+  // Sets the size of the buttons in this container.
+  void SetButtonSize(const gfx::Size& size);
+
   // views::View:
   gfx::Size GetPreferredSize() const override;
   void Layout() override;
   const char* GetClassName() const override;
 
-  // Overridden from gfx::AnimationDelegate:
+  // gfx::AnimationDelegate:
   void AnimationEnded(const gfx::Animation* animation) override;
   void AnimationProgressed(const gfx::Animation* animation) override;
 
  private:
   friend class FrameCaptionButtonContainerViewTest;
 
-  struct ButtonIconIds {
-    ButtonIconIds();
-    ButtonIconIds(int icon_id,
-                  int hovered_background_id,
-                  int pressed_background_id);
-    ~ButtonIconIds();
-
-    int icon_image_id;
-    int hovered_background_image_id;
-    int pressed_background_image_id;
-  };
-
   // Sets |button|'s icon to |icon|. If |animate| is ANIMATE_YES, the button
   // will crossfade to the new icon. If |animate| is ANIMATE_NO and
   // |icon| == |button|->icon(), the crossfade animation is progressed to the
   // end.
   void SetButtonIcon(FrameCaptionButton* button,
                      CaptionButtonIcon icon,
                      Animate animate);
 
   // Returns true if maximize mode is not enabled, and |frame_| widget delegate
   // can be maximized.
@@ skipping 15 matching lines @@
 
   // The widget that the buttons act on.
   views::Widget* frame_;
 
   // The buttons. In the normal button style, at most one of |minimize_button_|
   // and |size_button_| is visible.
   FrameCaptionButton* minimize_button_;
   FrameCaptionButton* size_button_;
   FrameCaptionButton* close_button_;
 
-  // Mapping of the images needed to paint a button for each of the values of
+  // Mapping of the image needed to paint a button for each of the values of
   // CaptionButtonIcon.
-  std::map<CaptionButtonIcon, ButtonIconIds> button_icon_id_map_;
+  std::map<CaptionButtonIcon, int> button_icon_id_map_;
 
   // Animation that affects the position of |minimize_button_| and the
   // visibility of |size_button_|.
   scoped_ptr<gfx::SlideAnimation> maximize_mode_animation_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameCaptionButtonContainerView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_FRAME_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_CONTAINER_VIEW_H_