[GCM] Only allow the senders that the application is currently registered for

google_apis/gcm/gcm_client_impl_unittest.cc

 // Copyright 2014 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.
 
 #include "google_apis/gcm/gcm_client_impl.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/test/simple_test_clock.h"
@@ skipping 381 matching lines @@
   MCSMessage message(BuildDownstreamMessage(
       "project_id", "app_id", expected_data));
   EXPECT_TRUE(message.IsValid());
   ReceiveMessageFromMCS(message);
 
   expected_data.erase(expected_data.find("message_type"));
   EXPECT_EQ(MESSAGE_RECEIVED, last_event());
   EXPECT_EQ("app_id", last_app_id());
   EXPECT_EQ(expected_data.size(), last_message().data.size());
   EXPECT_EQ(expected_data, last_message().data);
+  EXPECT_EQ("project_id", last_message().sender_id);
 }
 
 TEST_F(GCMClientImplTest, DispatchDownstreamMessageSendError) {
   std::map<std::string, std::string> expected_data;
   expected_data["message_type"] = "send_error";
   expected_data["google.message_id"] = "007";
   MCSMessage message(BuildDownstreamMessage(
       "project_id", "app_id", expected_data));
   EXPECT_TRUE(message.IsValid());
   ReceiveMessageFromMCS(message);
@@ skipping 32 matching lines @@
   EXPECT_EQ(CurrentTime(), mcs_client()->last_data_message_stanza().sent());
   EXPECT_EQ("007", mcs_client()->last_data_message_stanza().id());
   EXPECT_EQ("gcm@chrome.com", mcs_client()->last_data_message_stanza().from());
   EXPECT_EQ("project_id", mcs_client()->last_data_message_stanza().to());
   EXPECT_EQ("key", mcs_client()->last_data_message_stanza().app_data(0).key());
   EXPECT_EQ("value",
             mcs_client()->last_data_message_stanza().app_data(0).value());
 }
 
 }  // namespace gcm