[GCM] API update to allow only a single sender in registration

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 346 matching lines @@
   EXPECT_EQ(kDeviceSecurityToken, mcs_client()->last_security_token());
 }
 
 TEST_F(GCMClientImplTest, CheckOut) {
   EXPECT_TRUE(mcs_client());
   gcm_client()->CheckOut();
   EXPECT_FALSE(mcs_client());
 }
 
 TEST_F(GCMClientImplTest, RegisterApp) {
-  std::vector<std::string> senders;
-  senders.push_back("sender");
-  gcm_client()->Register("app_id", "cert", senders);
+  gcm_client()->Register("app_id", "cert", "sender");
   CompleteRegistration("reg_id");
 
   EXPECT_EQ(REGISTRATION_COMPLETED, last_event());
   EXPECT_EQ("app_id", last_app_id());
   EXPECT_EQ("reg_id", last_registration_id());
   EXPECT_EQ(GCMClient::SUCCESS, last_result());
 }
 
 TEST_F(GCMClientImplTest, UnregisterApp) {
   gcm_client()->Unregister("app_id");
@@ skipping 64 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