[GCM] Add more UMA to GCM

google_apis/gcm/engine/unregistration_request.cc

 // 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.
 
 #include "google_apis/gcm/engine/unregistration_request.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 141 matching lines @@
   BuildFormEncoding(kDeleteKey, kDeleteValue, &body);
   BuildFormEncoding(kUnregistrationCallerKey,
                     kUnregistrationCallerValue,
                     &body);
 
   DVLOG(1) << "Unregistration request: " << body;
   url_fetcher_->SetUploadData(kRequestContentType, body);
 
   DVLOG(1) << "Performing unregistration for: " << request_info_.app_id;
   recorder_->RecordUnregistrationSent(request_info_.app_id);
+  request_start_time_ = base::TimeTicks::Now();
   url_fetcher_->Start();
 }
 
 void UnregistrationRequest::RetryWithBackoff(bool update_backoff) {
   if (update_backoff) {
     url_fetcher_.reset();
     backoff_entry_.InformOfRequest(false);
   }
 
   if (backoff_entry_.ShouldRejectRequest()) {
@@ skipping 25 matching lines @@
                             status,
                             UNREGISTRATION_STATUS_COUNT);
   recorder_->RecordUnregistrationResponse(request_info_.app_id, status);
 
   if (status == URL_FETCHING_FAILED ||
       status == SERVICE_UNAVAILABLE ||
       status == INTERNAL_SERVER_ERROR ||
       status == INCORRECT_APP_ID ||
       status == RESPONSE_PARSING_FAILED) {
     RetryWithBackoff(true);
-  } else {
-    // status == SUCCESS || HTTP_NOT_OK || NO_RESPONSE_BODY ||
-    // INVALID_PARAMETERS || UNKNOWN_ERROR
-    callback_.Run(status);
+    return;
   }
+
+  // status == SUCCESS || HTTP_NOT_OK || NO_RESPONSE_BODY ||
+  // INVALID_PARAMETERS || UNKNOWN_ERROR
+
+  if (status == SUCCESS) {
+    UMA_HISTOGRAM_COUNTS("GCM.UnregistrationRetryCount",
+                         backoff_entry_.failure_count());
+    UMA_HISTOGRAM_TIMES("GCM.UnregistrationCompleteTime",
+                        base::TimeTicks::Now() - request_start_time_);
+  }
+
+  callback_.Run(status);
 }
 
 }  // namespace gcm