BrowserContext should simply own DownloadManager

chrome/browser/plugins/plugin_installer.cc

Index: chrome/browser/plugins/plugin_installer.cc
diff --git a/chrome/browser/plugins/plugin_installer.cc b/chrome/browser/plugins/plugin_installer.cc
index bac5705594da229e40172b564db5b9efae94e75c..f40caa3320d3313993b44e97cd6980cbd9d22b36 100644
--- a/chrome/browser/plugins/plugin_installer.cc
+++ b/chrome/browser/plugins/plugin_installer.cc
@@ -136,8 +136,6 @@ void PluginInstaller::StartInstalling(const GURL& plugin_url,
   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadStarted());
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
-  DownloadManager* download_manager =
-      BrowserContext::GetDownloadManager(profile);
   download_util::RecordDownloadSource(
       download_util::INITIATED_BY_PLUGIN_INSTALLER);
   BrowserThread::PostTask(
@@ -148,12 +146,10 @@ void PluginInstaller::StartInstalling(const GURL& plugin_url,
                  web_contents->GetRenderProcessHost()->GetID(),
                  web_contents->GetRenderViewHost()->GetRoutingID(),
                  base::Bind(&PluginInstaller::DownloadStarted,
-                            base::Unretained(this),
-                            make_scoped_refptr(download_manager))));
+                            base::Unretained(this))));
 }
 
 void PluginInstaller::DownloadStarted(
-    scoped_refptr<content::DownloadManager> dlm,
     content::DownloadItem* item,
     net::Error error) {
   if (!item) {