Added callback to DownloadUrl() so we can find download failures.

chrome/browser/tab_contents/render_view_context_menu.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 <algorithm>
 #include <set>
 #include <utility>
 
 #include "chrome/browser/tab_contents/render_view_context_menu.h"
 
@@ skipping 1506 matching lines @@
       DownloadSaveInfo save_info;
       save_info.prompt_for_save_location = true;
       DownloadManager* dlm =
           DownloadServiceFactory::GetForProfile(profile_)->GetDownloadManager();
       dlm->DownloadUrl(url,
                        referrer,
                        params_.frame_charset,
                        false,  // Don't prefer_cache
                        -1,  // No POST id
                        save_info,
-                       source_web_contents_);
+                       source_web_contents_,
+                       DownloadManager::OnStartedCallback());
       break;
     }
 
     case IDC_CONTENT_CONTEXT_SAVEAVAS:
     case IDC_CONTENT_CONTEXT_SAVEIMAGEAS: {
       download_util::RecordDownloadSource(
           download_util::INITIATED_BY_CONTEXT_MENU);
       const GURL& referrer =
           params_.frame_url.is_empty() ? params_.page_url : params_.frame_url;
       const GURL& url = params_.src_url;
       DownloadSaveInfo save_info;
       save_info.prompt_for_save_location = true;
       int64 post_id = -1;
       if (url == source_web_contents_->GetURL()) {
         const NavigationEntry* entry =
             source_web_contents_->GetController().GetActiveEntry();
         if (entry)
           post_id = entry->GetPostID();
       }
       DownloadManager* dlm =
           DownloadServiceFactory::GetForProfile(profile_)->GetDownloadManager();
       dlm->DownloadUrl(url,
                        referrer,
                        "",
                        true,  // prefer_cache
                        post_id,
                        save_info,
-                       source_web_contents_);
+                       source_web_contents_,
+                       DownloadManager::OnStartedCallback());
       break;
     }
 
     case IDC_CONTENT_CONTEXT_COPYLINKLOCATION:
       WriteURLToClipboard(params_.unfiltered_link_url);
       break;
 
     case IDC_CONTENT_CONTEXT_COPYIMAGELOCATION:
     case IDC_CONTENT_CONTEXT_COPYAVLOCATION:
       WriteURLToClipboard(params_.src_url);
@@ skipping 431 matching lines @@
   source_web_contents_->GetRenderViewHost()->
       ExecuteMediaPlayerActionAtLocation(location, action);
 }
 
 void RenderViewContextMenu::PluginActionAt(
     const gfx::Point& location,
     const WebPluginAction& action) {
   source_web_contents_->GetRenderViewHost()->
       ExecutePluginActionAtLocation(location, action);
 }