[Chromoting] Enable jscompile for webapp unittests.

remoting/webapp/unittests/test_start.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.
+
+// Global test setup.
+// This code is run before each test in every module.
+
+QUnit.testStart(
+    /** @param {{module:string, name:string}} details */
+    function(details) {
+      console.log("Running: ", details.module, details.name);

[kelvinp, 2015/02/26 00:31:30]

Probably won't need to extra log spew to pollute the console.

[garykac, 2015/02/28 02:33:33]

Done.

+      chromeMocks.reset();
+      sinonHelpers.reset();
+    });