Replace the DownloadFileManager with direct ownership of DownloadFileImpl

content/browser/renderer_host/resource_dispatcher_host_impl.h

Index: content/browser/renderer_host/resource_dispatcher_host_impl.h
diff --git a/content/browser/renderer_host/resource_dispatcher_host_impl.h b/content/browser/renderer_host/resource_dispatcher_host_impl.h
index 7c4701de6bd9727e2c318aae8c221a6be1d4f83e..4fc19302aceb245700eef7091a770429b64cf618 100644
--- a/content/browser/renderer_host/resource_dispatcher_host_impl.h
+++ b/content/browser/renderer_host/resource_dispatcher_host_impl.h
@@ -35,7 +35,6 @@
 #include "net/url_request/url_request.h"
 #include "webkit/glue/resource_type.h"
 
-class DownloadFileManager;
 class ResourceHandler;
 class SaveFileManager;
 class WebContentsImpl;
@@ -144,10 +143,6 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
   // request. Experimentally obtained.
   static const int kAvgBytesPerOutstandingRequest = 4400;
 
-  DownloadFileManager* download_file_manager() const {
-    return download_file_manager_;
-  }
-
   SaveFileManager* save_file_manager() const {
     return save_file_manager_;
   }
@@ -367,9 +362,6 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
   scoped_ptr<base::RepeatingTimer<ResourceDispatcherHostImpl> >
       update_load_states_timer_;
 
-  // We own the download file writing thread and manager
-  scoped_refptr<DownloadFileManager> download_file_manager_;
-
   // We own the save file manager.
   scoped_refptr<SaveFileManager> save_file_manager_;