Implements the "Set to default" button on the zoom bubble.

chrome/browser/ui/views/location_bar/zoom_bubble_view.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_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/timer.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/label.h"
 
+class TabContents;
+
 // View used to display the zoom percentage when it has changed.
-class ZoomBubbleView : public views::BubbleDelegateView {
+class ZoomBubbleView : public views::ButtonListener,
+                       public views::BubbleDelegateView {
  public:
   // Shows the bubble and automatically closes it after a short time period if
   // |auto_close| is true.
   static void ShowBubble(views::View* anchor_view,
-                         int zoom_percent,
+                         TabContents* tab_contents,
                          bool auto_close);
   static void CloseBubble();
   static bool IsShowing();
 
  private:
   ZoomBubbleView(views::View* anchor_view,
-                 int zoom_percent,
+                 TabContents* tab_contents,
                  bool auto_close);
   virtual ~ZoomBubbleView();
 
+  // Refreshes the bubble by changing the zoom percentage appropriately and
+  // resetting the timer if necessary.
+  void Refresh();
+
   void Close();
 
+  // views::ButtonListener method.
+  virtual void ButtonPressed(views::Button* sender,
+                             const views::Event& event) OVERRIDE;
+
   // views::BubbleDelegateView method.
   virtual void Init() OVERRIDE;
 
-  // views::BubbleDelegateView:
+  // views::BubbleDelegateView method.
   virtual void WindowClosing() OVERRIDE;
 
   // Singleton instance of the zoom bubble. The zoom bubble can only be shown on
   // the active browser window, so there is no case in which it will be shown
   // twice at the same time.
   static ZoomBubbleView* zoom_bubble_;
 
   // Timer used to close the bubble when |auto_close_| is true.
   base::OneShotTimer<ZoomBubbleView> timer_;
 
   // Label displaying the zoom percentage.
   views::Label* label_;
 
-  // The zoom percentage to show in the bubble.
-  int zoom_percent_;
+  // The TabContents for the page whose zoom has changed.
+  TabContents* tab_contents_;
 
   // Whether the currently displayed bubble will automatically close.
   bool auto_close_;
 
   DISALLOW_COPY_AND_ASSIGN(ZoomBubbleView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_