PageActions can now specify multiple icons and switch between them...

chrome/browser/views/location_bar_view.h

 // Copyright (c) 2009 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_VIEWS_LOCATION_BAR_VIEW_H_
 #define CHROME_BROWSER_VIEWS_LOCATION_BAR_VIEW_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 314 matching lines @@
 
     // Overridden from LocationBarImageView.
     virtual void ShowInfoBubble();
 
     // Called to notify the PageAction that it should determine whether to be
     // visible or hidden. |contents| is the TabContents that is active, |url|
     // is the current page URL.
     void UpdateVisibility(TabContents* contents, GURL url);
 
     // A callback for when the image has loaded.
-    void OnImageLoaded(SkBitmap* image);
+    void OnImageLoaded(SkBitmap* image, size_t index);
 
   private:
     // We load the images for the PageActions on the file thread. These tasks
     // help with that.
     class LoadImageTask;
     class ImageLoadingTracker;
 
     // The location bar view that owns us.
     LocationBarView* owner_;
 
     // The current profile (not owned by us).
     Profile* profile_;
 
     // The PageAction that this view represents. The PageAction is not owned by
     // us, it resides in the extension of this particular profile.
     const PageAction* page_action_;
 
+    // The icons representing different states for the page action.
+    std::vector<SkBitmap> page_action_icons_;
+
     // The object that is waiting for the image loading to complete
     // asynchronously.
     ImageLoadingTracker* tracker_;
 
     // The tab id we are currently showing the icon for.
     int current_tab_id_;
 
     // The URL we are currently showing the icon for.
     GURL current_url_;
 
+    // The string to show for a tooltip;
+    std::string tooltip_;
+
     DISALLOW_COPY_AND_ASSIGN(PageActionImageView);
   };
 
   // Both Layout and OnChanged call into this. This updates the contents
   // of the 3 views: selected_keyword, keyword_hint and type_search_view. If
   // force_layout is true, or one of these views has changed in such a way as
   // to necessitate a layout, layout occurs as well.
   void DoLayout(bool force_layout);
 
   // Returns the height in pixels of the margin at the top of the bar.
@@ skipping 120 matching lines @@
   bool popup_window_mode_;
 
   // Used schedule a task for the first run info bubble.
   ScopedRunnableMethodFactory<LocationBarView> first_run_bubble_;
 
   // The positioner that places the autocomplete popup.
   AutocompletePopupPositioner* popup_positioner_;
 };
 
 #endif  // CHROME_BROWSER_VIEWS_LOCATION_BAR_VIEW_H_