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

google_apis/gcm/gcm_client_impl.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 "google_apis/gcm/gcm_client_impl.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 280 matching lines @@
   mcs_client_.reset();
   gcm_store_->Destroy(base::Bind(&GCMClientImpl::OnGCMStoreDestroyed,
                                  weak_ptr_factory_.GetWeakPtr()));
   checkin_request_.reset();
   pending_registrations_.clear();
   state_ = INITIALIZED;
 }
 
 void GCMClientImpl::Register(const std::string& app_id,
                              const std::string& cert,
-                             const std::vector<std::string>& sender_ids) {
+                             const std::string& sender_id) {
   DCHECK_EQ(state_, READY);
   RegistrationRequest::RequestInfo request_info(
       device_checkin_info_.android_id,
       device_checkin_info_.secret,
       app_id,
       cert,
-      sender_ids);
+      sender_id);
   DCHECK_EQ(0u, pending_registrations_.count(app_id));
 
   RegistrationRequest* registration_request =
       new RegistrationRequest(request_info,
                               kDefaultBackoffPolicy,
                               base::Bind(&GCMClientImpl::OnRegisterCompleted,
                                          weak_ptr_factory_.GetWeakPtr(),
                                          app_id),
                               kMaxRegistrationRetries,
                               url_request_context_getter_);
@@ skipping 186 matching lines @@
   if (iter != incoming_message.data.end())
     message_id = iter->second;
   delegate->OnMessageSendError(app_id, message_id, SERVER_ERROR);
 }
 
 void GCMClientImpl::SetMCSClientForTesting(scoped_ptr<MCSClient> mcs_client) {
   mcs_client_ = mcs_client.Pass();
 }
 
 }  // namespace gcm