Translate: move UMA related code in TranslateManager to TranslateManagerMetrics

chrome/browser/translate/translate_manager_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/browser/translate/translate_manager_metrics.h"
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_samples.h"
@@ skipping 47 matching lines @@
     EXPECT_EQ(expected_accept_languages, GetCount(
         TranslateManagerMetrics::INITIATION_STATUS_ACCEPT_LANGUAGES));
     EXPECT_EQ(expected_auto_by_config, GetCount(
         TranslateManagerMetrics::INITIATION_STATUS_AUTO_BY_CONFIG));
     EXPECT_EQ(expected_auto_by_link, GetCount(
         TranslateManagerMetrics::INITIATION_STATUS_AUTO_BY_LINK));
     EXPECT_EQ(expected_show_infobar, GetCount(
         TranslateManagerMetrics::INITIATION_STATUS_SHOW_INFOBAR));
   }
 
+  HistogramBase::Count GetTotalCount() {
+    Snapshot();
+    if (!samples_.get())
+      return 0;
+    HistogramBase::Count count = samples_->TotalCount();
+    if (!base_samples_.get())
+      return count;
+    return count - base_samples_->TotalCount();
+  }
+
  private:
   void Snapshot() {
     HistogramBase* histogram = StatisticsRecorder::FindHistogram(key_);
     if (!histogram)
       return;
     samples_ = histogram->SnapshotSamples();
   }
 
   HistogramBase::Count GetCount(HistogramBase::Sample value) {
     if (!samples_.get())
@@ skipping 42 matching lines @@
   TranslateManagerMetrics::ReportInitiationStatus(
       TranslateManagerMetrics::INITIATION_STATUS_AUTO_BY_CONFIG);
   recorder.CheckInitiationStatus(1, 1, 1, 1, 1, 1, 1, 1, 0, 0);
   TranslateManagerMetrics::ReportInitiationStatus(
       TranslateManagerMetrics::INITIATION_STATUS_AUTO_BY_LINK);
   recorder.CheckInitiationStatus(1, 1, 1, 1, 1, 1, 1, 1, 1, 0);
   TranslateManagerMetrics::ReportInitiationStatus(
       TranslateManagerMetrics::INITIATION_STATUS_SHOW_INFOBAR);
   recorder.CheckInitiationStatus(1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
 }
+
+TEST(TranslateManagerMetricsTest, ReportLanguageDetectionError) {
+  MetricsRecorder recorder(TranslateManagerMetrics::GetMetricsName(
+      TranslateManagerMetrics::UMA_LANGUAGE_DETECTION_ERROR));
+  EXPECT_EQ(0, recorder.GetTotalCount());
+  TranslateManagerMetrics::ReportLanguageDetectionError();
+  EXPECT_EQ(1, recorder.GetTotalCount());
+}
+
+TEST(TranslateManagerMetricsTest, ReportedUnsupportedLanguage) {
+  MetricsRecorder recorder(TranslateManagerMetrics::GetMetricsName(
+      TranslateManagerMetrics::UMA_SERVER_REPORTED_UNSUPPORTED_LANGUAGE));
+  EXPECT_EQ(0, recorder.GetTotalCount());
+  TranslateManagerMetrics::ReportUnsupportedLanguage();
+  EXPECT_EQ(1, recorder.GetTotalCount());
+}