[GCM] Reset store on checkin rejection and add checkin state to internals

google_apis/gcm/tools/mcs_probe.cc

Index: google_apis/gcm/tools/mcs_probe.cc
diff --git a/google_apis/gcm/tools/mcs_probe.cc b/google_apis/gcm/tools/mcs_probe.cc
index 0e76f05512f3af183199014cd26ff93ee1b18150..4dbcf312bbbaa28dc4e28532bb40050aeaaa9a34 100644
--- a/google_apis/gcm/tools/mcs_probe.cc
+++ b/google_apis/gcm/tools/mcs_probe.cc
@@ -231,6 +231,7 @@ class MCSProbe {
   void UpdateCallback(bool success);
   void ErrorCallback();
   void OnCheckInCompleted(
+      net::HttpStatusCode response_code,
       const checkin_proto::AndroidCheckinResponse& checkin_response);
   void StartMCSLogin();
 
@@ -463,8 +464,10 @@ void MCSProbe::CheckIn() {
 }
 
 void MCSProbe::OnCheckInCompleted(
+    net::HttpStatusCode response_code,
     const checkin_proto::AndroidCheckinResponse& checkin_response) {
-  bool success = checkin_response.has_android_id() &&
+  bool success = response_code == net::HTTP_OK &&
+                 checkin_response.has_android_id() &&
                  checkin_response.android_id() != 0UL &&
                  checkin_response.has_security_token() &&
                  checkin_response.security_token() != 0UL;