Adding support for authenticated copresence calls

components/copresence/rpc/rpc_handler.h

Index: components/copresence/rpc/rpc_handler.h
diff --git a/components/copresence/rpc/rpc_handler.h b/components/copresence/rpc/rpc_handler.h
index 34e64278025672e328d922a085a152067f74643f..94449b16e6aa92a49b04f6682215f7861e814304 100644
--- a/components/copresence/rpc/rpc_handler.h
+++ b/components/copresence/rpc/rpc_handler.h
@@ -66,11 +66,13 @@ class RpcHandler {
   // Arguments:
   // URLRequestContextGetter: Context for the HTTP POST request.
   // string: Name of the rpc to invoke. URL format: server.google.com/rpc_name
+  // string: The id of the app making the request.
   // MessageLite: Contents of POST request to be sent. This needs to be
   //     a (scoped) pointer to ease handling of the abstract MessageLite class.
   // ResponseCallback: Receives the response to the request.
   typedef base::Callback<void(net::URLRequestContextGetter*,
                               const std::string&,
+                              const std::string&,
                               scoped_ptr<google::protobuf::MessageLite>,
                               const PostCleanupCallback&)> PostCallback;
 
@@ -110,6 +112,7 @@ class RpcHandler {
   // to contact the server, but it can be overridden for testing.
   void SendHttpPost(net::URLRequestContextGetter* url_context_getter,
                     const std::string& rpc_name,
+                    const std::string& app_id,
                     scoped_ptr<google::protobuf::MessageLite> request_proto,
                     const PostCleanupCallback& callback);