Fourth patch in getting rid of caching MessageLoop pointers.

chrome/browser/renderer_host/save_file_resource_handler.cc

Index: chrome/browser/renderer_host/save_file_resource_handler.cc
===================================================================
--- chrome/browser/renderer_host/save_file_resource_handler.cc	(revision 30688)
+++ chrome/browser/renderer_host/save_file_resource_handler.cc	(working copy)
@@ -7,6 +7,7 @@
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
+#include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/download/save_file_manager.h"
 #include "net/base/io_buffer.h"
 
@@ -44,7 +45,8 @@
   info->request_id = request_id;
   info->content_disposition = content_disposition_;
   info->save_source = SaveFileCreateInfo::SAVE_FILE_FROM_NET;
-  save_manager_->file_loop()->PostTask(FROM_HERE,
+  ChromeThread::PostTask(
+      ChromeThread::FILE, FROM_HERE,
       NewRunnableMethod(save_manager_,
                         &SaveFileManager::StartSave,
                         info));
@@ -69,7 +71,8 @@
   // We are passing ownership of this buffer to the save file manager.
   net::IOBuffer* buffer = NULL;
   read_buffer_.swap(&buffer);
-  save_manager_->file_loop()->PostTask(FROM_HERE,
+  ChromeThread::PostTask(
+      ChromeThread::FILE, FROM_HERE,
       NewRunnableMethod(save_manager_,
                         &SaveFileManager::UpdateSaveProgress,
                         save_id_,
@@ -82,7 +85,8 @@
     int request_id,
     const URLRequestStatus& status,
     const std::string& security_info) {
-  save_manager_->file_loop()->PostTask(FROM_HERE,
+  ChromeThread::PostTask(
+      ChromeThread::FILE, FROM_HERE,
       NewRunnableMethod(save_manager_,
                         &SaveFileManager::SaveFinished,
                         save_id_,