Update references to the extension messaging APIs to point to the "runtime"

chrome/common/extensions/docs/examples/extensions/benchmark/script.js

+// Copyright (c) 2013 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.
+
 // The port for communicating back to the extension.
-var benchmarkExtensionPort = chrome.extension.connect();
+var benchmarkExtensionPort = chrome.runtime.connect();
 
 // The url is what this page is known to the benchmark as.
 // The benchmark uses this id to differentiate the benchmark's
 // results from random pages being browsed.
 
 // TODO(mbelshe): If the page redirects, the location changed and the
 // benchmark stalls.
 var benchmarkExtensionUrl = window.location.toString();
 
 // Compute max/min/avg dom tree depth.
@@ skipping 53 matching lines @@
                                         domNum: dom.length,
                                         domDepths: depths });
   } else {
     window.setTimeout(sendTimesToExtension, 100);
   }
 }
 
 // We can't use the onload event because this script runs at document idle,
 // which may run after the onload has completed.
 sendTimesToExtension();