Add the new UMA key 'Translate.LocalesOnDisabledByPrefs'.

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 151 matching lines @@
 
 TEST(TranslateManagerMetricsTest, ReportedUnsupportedLanguageAtInitiation) {
   const int ENGLISH = 25966;
 
   MetricsRecorder recorder(TranslateManagerMetrics::GetMetricsName(
       TranslateManagerMetrics::UMA_UNSUPPORTED_LANGUAGE_AT_INITIATION));
   EXPECT_EQ(0, recorder.GetTotalCount());
   TranslateManagerMetrics::ReportUnsupportedLanguageAtInitiation("en");
   EXPECT_EQ(1, recorder.GetCount(ENGLISH));
 }
+
+TEST(TranslateManagerMetricsTest, ReportedLocalesOnDisabledByPrefs) {
+  const int ENGLISH = 25966;
+
+  MetricsRecorder recorder(TranslateManagerMetrics::GetMetricsName(
+      TranslateManagerMetrics::UMA_LOCALES_ON_DISABLED_BY_PREFS));
+  EXPECT_EQ(0, recorder.GetTotalCount());
+  TranslateManagerMetrics::ReportLocalesOnDisabledByPrefs("en");
+  EXPECT_EQ(1, recorder.GetCount(ENGLISH));
+}