[GCM] Add more UMA to GCM

google_apis/gcm/engine/registration_request.h

Index: google_apis/gcm/engine/registration_request.h
diff --git a/google_apis/gcm/engine/registration_request.h b/google_apis/gcm/engine/registration_request.h
index 30bed41b7e9cb806dde19a5b359a8fee9034e6c6..d41f2858f6bb2dd7ba346bae68ae04f2d5555fc9 100644
--- a/google_apis/gcm/engine/registration_request.h
+++ b/google_apis/gcm/engine/registration_request.h
@@ -13,6 +13,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/time/time.h"
 #include "google_apis/gcm/base/gcm_export.h"
 #include "net/base/backoff_entry.h"
 #include "net/url_request/url_fetcher_delegate.h"
@@ -112,6 +113,7 @@ class GCM_EXPORT RegistrationRequest : public net::URLFetcherDelegate {
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   scoped_ptr<net::URLFetcher> url_fetcher_;
   int retries_left_;
+  base::TimeTicks request_start_time_;
 
   // Recorder that records GCM activities for debugging purpose. Not owned.
   GCMStatsRecorder* recorder_;