Convert IconManager to use new CancelableTaskTracker

chrome/browser/ui/views/download/download_item_view.h

Index: chrome/browser/ui/views/download/download_item_view.h
diff --git a/chrome/browser/ui/views/download/download_item_view.h b/chrome/browser/ui/views/download/download_item_view.h
index f4d91b238998bc346a0605ce8e94fa436eda1ed5..b4e1eada2c6af9da4f4643a1ea3e4471c5caa325 100644
--- a/chrome/browser/ui/views/download/download_item_view.h
+++ b/chrome/browser/ui/views/download/download_item_view.h
@@ -69,7 +69,7 @@ class DownloadItemView : public views::ButtonListener,
   void StopDownloadProgress();
 
   // IconManager::Client interface.
-  void OnExtractIconComplete(IconManager::Handle handle, gfx::Image* icon);
+  void OnExtractIconComplete(gfx::Image* icon);
 
   // Returns the DownloadItem model object belonging to this item.
   content::DownloadItem* download() const { return download_; }
@@ -281,7 +281,7 @@ class DownloadItemView : public views::ButtonListener,
   gfx::Point drag_start_point_;
 
   // For canceling an in progress icon request.
-  CancelableRequestConsumerT<int, 0> icon_consumer_;
+  CancelableTaskTracker cancelable_task_tracker_;
 
   // A model class to control the status text we display and the cancel
   // behavior.