[GCM] Adding basic G-services handling

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 157a73f355f9289f9c6aa312d2d04667b3f7bdf1..5f1407ccdc75378ab215cb30a5e743046d8a6647 100644
--- a/google_apis/gcm/tools/mcs_probe.cc
+++ b/google_apis/gcm/tools/mcs_probe.cc
@@ -210,7 +210,8 @@ class MCSProbe {
   void LoadCallback(scoped_ptr<GCMStore::LoadResult> load_result);
   void UpdateCallback(bool success);
   void ErrorCallback();
-  void OnCheckInCompleted(uint64 android_id, uint64 secret);
+  void OnCheckInCompleted(
+      const checkin_proto::AndroidCheckinResponse& checkin_response);
   void StartMCSLogin();
 
   base::DefaultClock clock_;
@@ -435,13 +436,20 @@ void MCSProbe::CheckIn() {
   checkin_request_->Start();
 }
 
-void MCSProbe::OnCheckInCompleted(uint64 android_id, uint64 secret) {
+void MCSProbe::OnCheckInCompleted(
+    const checkin_proto::AndroidCheckinResponse& checkin_response) {
+  bool success = checkin_response.has_android_id() &&
+                 checkin_response.android_id() != 0UL &&
+                 checkin_response.has_security_token() &&
+                 checkin_response.security_token() != 0UL;
   LOG(INFO) << "Check-in request completion "
-            << (android_id ? "success!" : "failure!");
-  if (!android_id || !secret)
+            << (success ? "success!" : "failure!");
+
+  if (!success)
     return;
-  android_id_ = android_id;
-  secret_ = secret;
+
+  android_id_ = checkin_response.android_id();
+  secret_ = checkin_response.security_token();
 
   gcm_store_->SetDeviceCredentials(android_id_,
                                    secret_,