Translate: add UMA to measure duration time of infobar user action

chrome/renderer/translate/translate_helper_metrics_unittest.cc

 // Copyright 2013 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 "chrome/renderer/translate/translate_helper_metrics.h"
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_samples.h"
@@ skipping 179 matching lines @@
 
 TEST(TranslateHelperMetricsTest, ReportTimeToTranslate) {
   MetricsRecorder recorder(TranslateHelperMetrics::GetMetricsName(
       TranslateHelperMetrics::UMA_TIME_TO_TRANSLATE));
   recorder.CheckTotalCount(0);
   TranslateHelperMetrics::ReportTimeToTranslate(4649.0);
   recorder.CheckValueInLogs(4649.0);
   recorder.CheckTotalCount(1);
 }
 
+TEST(TranslateHelperMetricsTest, ReportUserActionDuration) {
+  MetricsRecorder recorder(TranslateHelperMetrics::GetMetricsName(
+      TranslateHelperMetrics::UMA_USER_ACTION_DURATION));
+  recorder.CheckTotalCount(0);
+  TimeTicks begin = TimeTicks::Now();
+  TimeTicks end = begin + base::TimeDelta::FromSeconds(3776);
+  TranslateHelperMetrics::ReportUserActionDuration(begin, end);
+  recorder.CheckValueInLogs(3776000.0);
+  recorder.CheckTotalCount(1);
+}
+
 #if defined(ENABLE_LANGUAGE_DETECTION)
 
 TEST(TranslateHelperMetricsTest, ReportLanguageDetectionTime) {
   MetricsRecorder recorder(TranslateHelperMetrics::GetMetricsName(
       TranslateHelperMetrics::UMA_LANGUAGE_DETECTION));
   recorder.CheckTotalCount(0);
   TimeTicks begin = TimeTicks::Now();
-  TimeTicks end = begin + base::TimeDelta::FromMicroseconds(9009.0);
+  TimeTicks end = begin + base::TimeDelta::FromMicroseconds(9009);
   TranslateHelperMetrics::ReportLanguageDetectionTime(begin, end);
   recorder.CheckValueInLogs(9.009);
   recorder.CheckTotalCount(1);
 }
 
 #endif  // defined(ENABLE_LANGUAGE_DETECTION)