Fix translate namespace

components/translate/core/browser/translate_browser_metrics.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 COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_BROWSER_METRICS_H_
 #define COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_BROWSER_METRICS_H_
 
 #include <string>
 
+namespace translate {
+
 namespace TranslateBrowserMetrics {
 
 // An indexing type to query each UMA entry name via GetMetricsName() function.
 // Note: |kMetricsEntries| should be updated when a new entry is added here.
 enum MetricsNameIndex {
   UMA_INITIATION_STATUS,
   UMA_LANGUAGE_DETECTION_ERROR,
   UMA_LOCALES_ON_DISABLED_BY_PREFS,
   UMA_UNDISPLAYABLE_LANGUAGE,
   UMA_UNSUPPORTED_LANGUAGE_AT_INITIATION,
@@ skipping 34 matching lines @@
 // a undisplayable language in the user's locale.
 void ReportUndisplayableLanguage(const std::string& language);
 
 void ReportUnsupportedLanguageAtInitiation(const std::string& language);
 
 // Provides UMA entry names for unit tests.
 const char* GetMetricsName(MetricsNameIndex index);
 
 }  // namespace TranslateBrowserMetrics
 
+}  // namespace translate
+
 #endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_BROWSER_METRICS_H_