Replace the DownloadFileManager with direct ownership of DownloadFileImpl

content/browser/browser_context.cc

Index: content/browser/browser_context.cc
diff --git a/content/browser/browser_context.cc b/content/browser/browser_context.cc
index 58e5df8fd0552217a71a2bea906ad0b7f0b7b117..cbfd2ca7ddfe1fb7e45b733d0950c2775ffb2ef0 100644
--- a/content/browser/browser_context.cc
+++ b/content/browser/browser_context.cc
@@ -6,13 +6,10 @@
 
 #if !defined(OS_IOS)
 #include "content/browser/appcache/chrome_appcache_service.h"
-#include "webkit/database/database_tracker.h"
 #include "content/browser/dom_storage/dom_storage_context_impl.h"
-#include "content/browser/download/download_file_manager.h"
 #include "content/browser/download/download_manager_impl.h"
 #include "content/browser/in_process_webkit/indexed_db_context_impl.h"
 #include "content/browser/renderer_host/resource_dispatcher_host_impl.h"
-#include "content/public/browser/resource_context.h"
 #include "content/public/browser/site_instance.h"
 #include "content/browser/storage_partition_impl.h"
 #include "content/browser/storage_partition_impl_map.h"
@@ -25,6 +22,7 @@
 #include "net/cookies/cookie_store.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
+#include "webkit/database/database_tracker.h"
 #endif // !OS_IOS
 
 using base::UserDataAdapter;
@@ -88,12 +86,8 @@ DownloadManager* BrowserContext::GetDownloadManager(
   if (!context->GetUserData(kDownloadManagerKeyName)) {
     ResourceDispatcherHostImpl* rdh = ResourceDispatcherHostImpl::Get();
     DCHECK(rdh);
-    DownloadFileManager* file_manager = rdh->download_file_manager();
-    DCHECK(file_manager);
     scoped_refptr<DownloadManager> download_manager =
         new DownloadManagerImpl(
-            file_manager,
-            scoped_ptr<DownloadItemFactory>(),
             GetContentClient()->browser()->GetNetLog());
 
     context->SetUserData(