title: Messaging between Android application and Chrome extension
body: <p>I'm hoping to use Google Cloud Messaging to send messages between an Android application and a Google Chrome extension. The basic process would be:</p>
  
  <pre><code>Android app starts up...
  ... Android app sends initial message to Chrome extension (on PC)
  ... Chrome extension sends initial response message back to Android app.
  ... [Android app and Chrome extension continue to exchange messages]
  </code></pre>
  
  <p>The Android app will be using Google authentication, and the Chrome extension will of course require the user to be logged in. </p>
  
  <p>Is this possible without an intermediate server? I've done some initial research, but much of the documentation seems to concentrate on using GCM between Chrome &lt;> Server, or Android &lt;> Server rather than between Chrome &lt;> Android. </p>
  
  <p>Thanks.</p>