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

chrome/renderer/extensions/miscellaneous_bindings.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/renderer/extensions/miscellaneous_bindings.h"
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "chrome/common/extensions/message_bundle.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/renderer/extensions/chrome_v8_context.h"
 #include "chrome/renderer/extensions/chrome_v8_context_set.h"
 #include "chrome/renderer/extensions/chrome_v8_extension.h"
 #include "chrome/renderer/extensions/dispatcher.h"
 #include "chrome/renderer/extensions/event_bindings.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
 #include "grit/renderer_resources.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebScopedMicrotaskSuppression.h"
 #include "v8/include/v8.h"
 
 // Message passing API example (in a content script):
 // var extension =
 //    new chrome.Extension('00123456789abcdef0123456789abcdef0123456');
-// var port = extension.connect();
+// var port = runtime.connect();
 // port.postMessage('Can you hear me now?');
 // port.onmessage.addListener(function(msg, port) {
 //   alert('response=' + msg);
 //   port.postMessage('I got your reponse');
 // });
 
 using content::RenderThread;
 
 namespace {
 
@@ skipping 260 matching lines @@
     std::vector<v8::Handle<v8::Value> > arguments;
     arguments.push_back(v8::Integer::New(port_id));
     arguments.push_back(v8::Boolean::New(connection_error));
     (*it)->CallChromeHiddenMethod("Port.dispatchOnDisconnect",
                                   arguments.size(), &arguments[0],
                                   NULL);
   }
 }
 
 }  // namespace extensions