[GCM] Adding a list of accounts present on the client to checkin request

google_apis/gcm/gcm_client_impl.h

Index: google_apis/gcm/gcm_client_impl.h
diff --git a/google_apis/gcm/gcm_client_impl.h b/google_apis/gcm/gcm_client_impl.h
index 40b90f2a55cfcf143b5829ceea4d3976abbc1677..9299bd57d207831d618a9d3802366ecfd2b71ec6 100644
--- a/google_apis/gcm/gcm_client_impl.h
+++ b/google_apis/gcm/gcm_client_impl.h
@@ -50,6 +50,7 @@ class GCM_EXPORT GCMClientImpl : public GCMClient {
   virtual void Initialize(
       const checkin_proto::ChromeBuildProto& chrome_build_proto,
       const base::FilePath& store_path,
+      const std::vector<std::string>& account_ids,
       const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner,
       const scoped_refptr<net::URLRequestContextGetter>&
           url_request_context_getter,
@@ -195,6 +196,7 @@ class GCM_EXPORT GCMClientImpl : public GCMClient {
   scoped_ptr<MCSClient> mcs_client_;
 
   scoped_ptr<CheckinRequest> checkin_request_;
+  std::vector<std::string> account_ids_;
 
   // Currently pending registrations. GCMClientImpl owns the
   // RegistrationRequests.