[GCM] Add more UMA to GCM

google_apis/gcm/engine/checkin_request.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GOOGLE_APIS_GCM_ENGINE_CHECKIN_REQUEST_H_
 #define GOOGLE_APIS_GCM_ENGINE_CHECKIN_REQUEST_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
+#include "base/time/time.h"
 #include "google_apis/gcm/base/gcm_export.h"
 #include "google_apis/gcm/protocol/android_checkin.pb.h"
 #include "google_apis/gcm/protocol/checkin.pb.h"
 #include "net/base/backoff_entry.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "url/gurl.h"
 
 namespace net {
 class URLRequestContextGetter;
 }
@@ skipping 52 matching lines @@
   // failure when |update_backoff| is true.
   void RetryWithBackoff(bool update_backoff);
 
   net::URLRequestContextGetter* request_context_getter_;
   CheckinRequestCallback callback_;
 
   net::BackoffEntry backoff_entry_;
   GURL checkin_url_;
   scoped_ptr<net::URLFetcher> url_fetcher_;
   const RequestInfo request_info_;
+  base::TimeTicks request_start_time_;
 
   // Recorder that records GCM activities for debugging purpose. Not owned.
   GCMStatsRecorder* recorder_;
 
   base::WeakPtrFactory<CheckinRequest> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CheckinRequest);
 };
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_CHECKIN_REQUEST_H_