Move creation and ownership of DownloadManager from the embedder to content. This matches all the o…

content/browser/download/drag_download_file.cc

Index: content/browser/download/drag_download_file.cc
===================================================================
--- content/browser/download/drag_download_file.cc	(revision 140592)
+++ content/browser/download/drag_download_file.cc	(working copy)
@@ -16,6 +16,7 @@
 #include "content/public/browser/download_url_parameters.h"
 #include "net/base/file_stream.h"
 
+using content::BrowserContext;
 using content::BrowserThread;
 using content::DownloadItem;
 using content::DownloadManager;
@@ -127,7 +128,8 @@
   }
 #endif
 
-  download_manager_ = web_contents_->GetBrowserContext()->GetDownloadManager();
+  download_manager_ = BrowserContext::GetDownloadManager(
+      web_contents_->GetBrowserContext());
   download_manager_observer_added_ = true;
   download_manager_->AddObserver(this);