Get extension version synchrously from the manifest.

remoting/webapp/server_log_entry.js

 // 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.
 
 /**
  * @fileoverview
  * A class of server log entries.
  */
 
 'use strict';
@@ skipping 433 matching lines @@
   if (match && (match.length >= 2)) {
     return match[1];
   }
   return null;
 };
 
 /**
  * Adds a field specifying the webapp version to this log entry.
  */
 remoting.ServerLogEntry.prototype.addWebappVersionField = function() {
-  this.set(remoting.ServerLogEntry.KEY_WEBAPP_VERSION_,
-      chrome.app.getDetails().version);
+  var manifest = chrome.runtime.getManifest();
+  if (manifest && manifest.version) {
+    this.set(remoting.ServerLogEntry.KEY_WEBAPP_VERSION_, manifest.version);
+  }
 };
 
 /**
  * Adds a field specifying the mode to this log entry.
  *
  * @param {remoting.ClientSession.Mode} mode
  */
 remoting.ServerLogEntry.prototype.addModeField = function(mode) {
   this.set(remoting.ServerLogEntry.KEY_MODE_,
       remoting.ServerLogEntry.getModeField(mode));
 };
 
 /**
  * Gets the value of the mode field to be put in a log entry.
  *
  * @private
  * @param {remoting.ClientSession.Mode} mode
  * @return {string}
  */
 remoting.ServerLogEntry.getModeField = function(mode) {
   switch(mode) {
     case remoting.ClientSession.Mode.IT2ME:
       return remoting.ServerLogEntry.VALUE_MODE_IT2ME_;
     case remoting.ClientSession.Mode.ME2ME:
       return remoting.ServerLogEntry.VALUE_MODE_ME2ME_;
     default:
       return remoting.ServerLogEntry.VALUE_MODE_UNKNOWN_;
   }
 };