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

chrome/browser/gtk/location_bar_view_gtk.cc

 // 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.
 
 #include "chrome/browser/gtk/location_bar_view_gtk.h"
 
 #include <string>
 
 #include "app/gfx/canvas_paint.h"
 #include "app/l10n_util.h"
@@ skipping 1146 matching lines @@
     gtk_widget_hide_all(event_box_.get());
 
   if (visible != old_visible) {
     NotificationService::current()->Notify(
         NotificationType::EXTENSION_PAGE_ACTION_VISIBILITY_CHANGED,
         Source<ExtensionAction>(page_action_),
         Details<TabContents>(contents));
   }
 }
 
-void LocationBarViewGtk::PageActionViewGtk::OnImageLoaded(SkBitmap* image,
-                                                          size_t index) {
+void LocationBarViewGtk::PageActionViewGtk::OnImageLoaded(
+    ImageLoadingTracker* source, SkBitmap* image, size_t index) {
   // We loaded icons()->size() icons, plus one extra if the page action had
   // a default icon.
   size_t total_icons = page_action_->icon_paths()->size();
   if (!page_action_->default_icon_path().empty())
     total_icons++;
   DCHECK(index < total_icons);
 
   // Map the index of the loaded image back to its name. If we ever get an
   // index greater than the number of icons, it must be the default icon.
   if (image) {
@@ skipping 64 matching lines @@
 
   std::string badge_text = page_action_->GetBadgeText(tab_id);
   if (badge_text.empty())
     return FALSE;
 
   gfx::CanvasPaint canvas(event, false);
   gfx::Rect bounding_rect(widget->allocation);
   page_action_->PaintBadge(&canvas, bounding_rect, tab_id);
   return FALSE;
 }