BrowserContext should simply own DownloadManager

chrome/browser/plugins/plugin_installer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/plugins/plugin_installer.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/process.h"
 #include "chrome/browser/download/download_service.h"
@@ skipping 118 matching lines @@
   weak_observers_.RemoveObserver(observer);
 }
 
 void PluginInstaller::StartInstalling(const GURL& plugin_url,
                                       content::WebContents* web_contents) {
   DCHECK_EQ(INSTALLER_STATE_IDLE, state_);
   state_ = INSTALLER_STATE_DOWNLOADING;
   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(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&BeginDownload,
                  plugin_url,
                  profile->GetResourceContext(),
                  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) {
     DCHECK_NE(net::OK, error);
     std::string msg =
         base::StringPrintf("Error %d: %s", error, net::ErrorToString(error));
     DownloadError(msg);
     return;
   }
   DCHECK_EQ(net::OK, error);
@@ skipping 16 matching lines @@
   DCHECK_EQ(INSTALLER_STATE_DOWNLOADING, state_);
   state_ = INSTALLER_STATE_IDLE;
   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadError(msg));
 }
 
 void PluginInstaller::DownloadCancelled() {
   DCHECK_EQ(INSTALLER_STATE_DOWNLOADING, state_);
   state_ = INSTALLER_STATE_IDLE;
   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadCancelled());
 }