[GCM] Add heartbeat manager and reconnection logic due to heartbeat failure

google_apis/gcm/engine/connection_handler.h

Index: google_apis/gcm/engine/connection_handler.h
diff --git a/google_apis/gcm/engine/connection_handler.h b/google_apis/gcm/engine/connection_handler.h
index 5b9ea715c7803d4ac9ec7ff9ba076ab4049c7101..50b880dafc5e2e05f226af2c1ed592d90203b1a6 100644
--- a/google_apis/gcm/engine/connection_handler.h
+++ b/google_apis/gcm/engine/connection_handler.h
@@ -48,7 +48,7 @@ class GCM_EXPORT ConnectionHandler {
   // Note: It is correct and expected to call Init more than once, as connection
   // issues are encountered and new connections must be made.
   virtual void Init(const mcs_proto::LoginRequest& login_request,
-                    scoped_ptr<net::StreamSocket> socket) = 0;
+                    net::StreamSocket* socket) = 0;
 
   // Checks that a handshake has been completed and a message is not already
   // in flight.