Added net logging to BaseFile.

chrome/browser/resources/net_internals/events_view.css

 /**
  * 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.
  */
 
 #events-view-filter-box {
   background: #efefef;
   padding: 5px;
   border-bottom: 1px solid gray;
@@ skipping 79 matching lines @@
 }
 
 #events-view-source-list-tbody .source_UDP_SOCKET {
   color: #803030;
 }
 
 #events-view-source-list-tbody .source_PROXY_SCRIPT_DECIDER {
   color: green;
 }
 
+#events-view-source-list-tbody .source_DOWNLOAD {
+  color: #707000;
+}
+
 #events-view-source-list-tbody .source_FILESTREAM {
   color: #700070;
 }
 
 #events-view-source-list-tbody .source_NONE {
   color: red;
 }