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

chrome/browser/extensions/api/gcm/gcm_apitest.cc

 // Copyright 2013 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 "base/run_loop.h"
 #include "chrome/browser/extensions/api/gcm/gcm_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/services/gcm/fake_gcm_profile_service.h"
 #include "chrome/browser/services/gcm/gcm_client_factory.h"
@@ skipping 88 matching lines @@
 IN_PROC_BROWSER_TEST_F(GcmApiTest, Register) {
   if (ShouldSkipTest())
     return;
 
   StartCollecting();
   ASSERT_TRUE(RunExtensionTest("gcm/functions/register"));
 
   // SHA1 of the public key provided in manifest.json.
   EXPECT_EQ("26469186F238EE08FA71C38311C6990F61D40DCA",
             service()->last_registered_cert());
-  const std::vector<std::string>& sender_ids =
-      service()->last_registered_sender_ids();
-  EXPECT_TRUE(std::find(sender_ids.begin(), sender_ids.end(), "Sender1") !=
-                  sender_ids.end());
-  EXPECT_TRUE(std::find(sender_ids.begin(), sender_ids.end(), "Sender2") !=
-                  sender_ids.end());
+  EXPECT_EQ("Sender1", service()->last_registered_sender_id());
 }
 
 IN_PROC_BROWSER_TEST_F(GcmApiTest, RegisterWithoutKey) {
   if (ShouldSkipTest())
     return;
 
   ASSERT_TRUE(RunExtensionTest("gcm/functions/register_without_key"));
 }
 
 IN_PROC_BROWSER_TEST_F(GcmApiTest, SendValidation) {
@@ skipping 85 matching lines @@
   ResultCatcher incognito_catcher;
   incognito_catcher.RestrictToProfile(profile()->GetOffTheRecordProfile());
 
   ASSERT_TRUE(RunExtensionTestIncognito("gcm/functions/incognito"));
 
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
   EXPECT_TRUE(incognito_catcher.GetNextResult()) << incognito_catcher.message();
 }
 
 }  // namespace extensions