title: Use of C2D_MESSAGE permission in Google Cloud Messaging
body: <p>I'm trying to understand how C2D_MESSAGE permission is being used by the GCM apps. My guess is that GCM service client app will send a broadcast to the subscriber app via the sendBroadcast(Intent intent, String receiverPermission) API method, where the receiver permission will be set as the C2D_MESSAGE permission defined by the subscriber app. However, I wasn't able to find this in the Google Play Store app (which I believe is the GCM service client app?) itself. Am I looking at the wrong place? Or is it the case that this is done in a different way? All help is appreciated. Thanks!</p>