[GCM] Fix gcm login to properly identify chrome

google_apis/gcm/engine/mcs_client_unittest.cc

Index: google_apis/gcm/engine/mcs_client_unittest.cc
diff --git a/google_apis/gcm/engine/mcs_client_unittest.cc b/google_apis/gcm/engine/mcs_client_unittest.cc
index 6bdce132b68b065fd6260ea024c6944691456840..1bb8bfd5d143bf3da68a4ee8294554457cf221ab 100644
--- a/google_apis/gcm/engine/mcs_client_unittest.cc
+++ b/google_apis/gcm/engine/mcs_client_unittest.cc
@@ -63,7 +63,7 @@ class TestMCSClient : public MCSClient {
   TestMCSClient(base::Clock* clock,
                 ConnectionFactory* connection_factory,
                 GCMStore* gcm_store)
-    : MCSClient(clock, connection_factory, gcm_store),
+    : MCSClient("", clock, connection_factory, gcm_store),
       next_id_(0) {
   }
 
@@ -181,7 +181,7 @@ void MCSClientTest::InitializeClient() {
 void MCSClientTest::LoginClient(
     const std::vector<std::string>& acknowledged_ids) {
   scoped_ptr<mcs_proto::LoginRequest> login_request =
-      BuildLoginRequest(kAndroidId, kSecurityToken, user_serial_numbers());
+      BuildLoginRequest(kAndroidId, kSecurityToken, "", user_serial_numbers());
   for (size_t i = 0; i < acknowledged_ids.size(); ++i)
     login_request->add_received_persistent_id(acknowledged_ids[i]);
   GetFakeHandler()->ExpectOutgoingMessage(
@@ -342,7 +342,10 @@ TEST_F(MCSClientTest, SendMessageRMQWhileDisconnected) {
   GetFakeHandler()->ExpectOutgoingMessage(
       MCSMessage(
           kLoginRequestTag,
-          BuildLoginRequest(kAndroidId, kSecurityToken, user_serial_numbers()).
+          BuildLoginRequest(kAndroidId,
+                            kSecurityToken,
+                            "",
+                            user_serial_numbers()).
               PassAs<const google::protobuf::MessageLite>()));
   // The second (re)send.
   MCSMessage message2(BuildDataMessage("from",