Fourth patch in getting rid of caching MessageLoop pointers.

chrome/browser/download/download_manager.h

Index: chrome/browser/download/download_manager.h
===================================================================
--- chrome/browser/download/download_manager.h	(revision 30688)
+++ chrome/browser/download/download_manager.h	(working copy)
@@ -59,7 +59,6 @@
 class DownloadItemView;
 class DownloadManager;
 class GURL;
-class MessageLoop;
 class PrefService;
 class Profile;
 class ResourceDispatcherHost;
@@ -592,13 +591,6 @@
   // Non-owning pointer for handling file writing on the download_thread_.
   DownloadFileManager* file_manager_;
 
-  // A pointer to the main UI loop.
-  MessageLoop* ui_loop_;
-
-  // A pointer to the file thread's loop. The file thread lives longer than
-  // the DownloadManager, so this is safe to cache.
-  MessageLoop* file_loop_;
-
   // User preferences
   BooleanPrefMember prompt_for_download_;
   StringPrefMember download_path_;