Adds the source ImageLoadingTracker to OnImageLoaded. I need this in a

chrome/browser/gtk/location_bar_view_gtk.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_GTK_LOCATION_BAR_VIEW_GTK_H_
 #define CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <map>
@@ skipping 176 matching lines @@
     }
 
     bool IsVisible() { return GTK_WIDGET_VISIBLE(widget()); }
 
     // 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 from ImageLoadingTracker for when the image has loaded.
-    virtual void OnImageLoaded(SkBitmap* image, size_t index);
+    virtual void OnImageLoaded(ImageLoadingTracker* source, SkBitmap* image,
+                               size_t index);
 
     // Simulate left mouse click on the page action button.
     void TestActivatePageAction();
 
    private:
     static gboolean OnButtonPressedThunk(GtkWidget* sender,
                                          GdkEvent* event,
                                          PageActionViewGtk* page_action_view) {
       return page_action_view->OnButtonPressed(sender, event);
     }
@@ skipping 169 matching lines @@
   // Indicate if |tab_to_search_hint_| should be shown.
   bool show_keyword_hint_;
 
   // Indicate if |type_to_search_hint_| should be shown.
   bool show_search_hint_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarViewGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_