chromeos: Add support for multiple volume icons.

chrome/browser/chromeos/setting_level_bubble.h

 // Copyright (c) 2010 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_CHROMEOS_SETTING_LEVEL_BUBBLE_H_
 #define CHROME_BROWSER_CHROMEOS_SETTING_LEVEL_BUBBLE_H_
 #pragma once
 
 #include "app/animation_delegate.h"
 #include "app/slide_animation.h"
 #include "base/timer.h"
 #include "chrome/browser/views/info_bubble.h"
 
 class SkBitmap;
 
 namespace chromeos {
 
 class SettingLevelBubbleView;
 
 // Singleton class controlling a bubble displaying a level-based setting like
 // volume or brightness.
 class SettingLevelBubble : public InfoBubbleDelegate,
                            public AnimationDelegate {
  public:
   void ShowBubble(int percent);
 
  protected:
-  explicit SettingLevelBubble(SkBitmap* icon);
+  explicit SettingLevelBubble(SkBitmap* increase_icon,
+                              SkBitmap* decrease_icon,
+                              SkBitmap* zero_icon);
   virtual ~SettingLevelBubble() {}
 
  private:
   void OnTimeout();
 
   // Overridden from InfoBubbleDelegate.
   virtual void InfoBubbleClosing(InfoBubble* info_bubble,
                                  bool closed_by_escape);
   virtual bool CloseOnEscape() { return true; }
   virtual bool FadeInOnShow() { return false; }
 
   // Overridden from AnimationDelegate.
   virtual void AnimationEnded(const Animation* animation);
   virtual void AnimationProgressed(const Animation* animation);
 
   // Previous and current percentages, or -1 if not yet shown.
   int previous_percent_;
   int current_percent_;
 
-  // Icon displayed in the bubble.  Not owned by us.
-  SkBitmap* icon_;
+  // Icons displayed in the bubble when increasing or decreasing the level or
+  // setting it to zero.  Not owned by us.
+  SkBitmap* increase_icon_;
+  SkBitmap* decrease_icon_;
+  SkBitmap* zero_icon_;
 
   // Currently shown bubble or NULL.
   InfoBubble* bubble_;
 
   // Its contents view, owned by InfoBubble.
   SettingLevelBubbleView* view_;
 
   SlideAnimation animation_;
   base::OneShotTimer<SettingLevelBubble> timeout_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(SettingLevelBubble);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SETTING_LEVEL_BUBBLE_H_