Refactor downloads into a ProfileKeyedService.

chrome/browser/download/download_crx_util.cc

Index: chrome/browser/download/download_crx_util.cc
diff --git a/chrome/browser/download/download_crx_util.cc b/chrome/browser/download/download_crx_util.cc
index 574c9ab9a1d25a996b0e739832cc488e598c2fdb..186abe872a6269fa7e64063c8ab2ea4db6be9e78 100644
--- a/chrome/browser/download/download_crx_util.cc
+++ b/chrome/browser/download/download_crx_util.cc
@@ -4,6 +4,8 @@
 //
 // Download code which handles CRX files (extensions, themes, apps, ...).
 
+#include "chrome/browser/download/download_service.h"
+#include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/extensions/crx_installer.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
@@ -55,8 +57,10 @@ scoped_refptr<CrxInstaller> OpenChromeExtension(
   CHECK(service);
   NotificationService* nservice = NotificationService::current();
   GURL nonconst_download_url = download_item.GetURL();
+  DownloadManager* download_manager =
+      DownloadServiceFactory::GetForProfile(profile)->GetDownloadManager();
   nservice->Notify(chrome::NOTIFICATION_EXTENSION_READY_FOR_INSTALL,
-                   Source<DownloadManager>(profile->GetDownloadManager()),
+                   Source<DownloadManager>(download_manager),
                    Details<GURL>(&nonconst_download_url));
 
   scoped_refptr<CrxInstaller> installer(