Refactor sinon helper to make it easier to use.

remoting/webapp/js_proto/sinon_stub_proto.js

-// Copyright 2015 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.
-
-// How to create sinon.stubs that work with jscompile.
-//
-// To create the stub:
-//   sinon.$setupStub(<object>, <function-name>)
-//
-// To access the stub in unittests:
-//   <object>.<function-name>.$testStub.<sinon-test>
-//
-// For example:
-//    sinon.$setupStub(chrome.socket, 'create');
-//    chrome.socket.create.$testStub.restore();
-//
-// For jscompile to analyze these corectly, you'll also need to add an entry
-// in this file for any object you stub out this way. For example:
-//    chrome.socket.create.$testStub = new sinon.TestStub();
-
-base.debug.assert.$testStub = new sinon.TestStub();
-base.isAppsV2.$testStub = new sinon.TestStub();
-
-chrome.i18n.getMessage.$testStub = new sinon.TestStub();
-
-chrome.socket.connect.$testStub = new sinon.TestStub();
-chrome.socket.create.$testStub = new sinon.TestStub();
-chrome.socket.destroy.$testStub = new sinon.TestStub();
-chrome.socket.read.$testStub = new sinon.TestStub();
-chrome.socket.secure.$testStub = new sinon.TestStub();
-chrome.socket.write.$testStub = new sinon.TestStub();
-
-remoting.setMode.$testStub = new sinon.TestStub();
-remoting.Host.needsUpdate.$testStub = new sinon.TestStub();