Index: chrome/browser/language_usage_metrics.h |
diff --git a/chrome/browser/language_usage_metrics.h b/chrome/browser/language_usage_metrics.h |
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+++ b/chrome/browser/language_usage_metrics.h |
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+// Copyright (c) 2011 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 CHROME_BROWSER_LANGUAGE_USAGE_METRICS_H_ |
+#define CHROME_BROWSER_LANGUAGE_USAGE_METRICS_H_ |
+#pragma once |
+ |
+#include <set> |
+#include <string> |
+ |
+#include "base/gtest_prod_util.h" |
+#include "third_party/cld/languages/public/languages.h" |
+ |
+// Methods to record language usage as UMA histograms. |
+// Language codes are defined in third_party/cld/languages/proto/languages.pb.h |
+class LanguageUsageMetrics { |
+ public: |
+ // Records accept languages as a UMA histogram. |accept_languages| is a |
+ // case-insensitive comma-separated list of languages/locales of either xx, |
+ // xx-YY, or xx_YY format where xx is iso-639 language code and YY is iso-3166 |
+ // country code. Country code is ignored. That is, xx and XX-YY are considered |
+ // identical and recorded once. |
+ static void RecordAcceptLanguages(const std::string& accept_languages); |
+ |
+ // Records the application language as a UMA histogram. |application_locale| |
+ // is a case-insensitive locale string of either xx, xx-YY, or xx_YY format. |
+ // Only the language part (xx in the example) is considered. |
+ static void RecordApplicationLanguage(const std::string& application_locale); |
+ |
+ private: |
+ // This class must not be instantiated. |
+ LanguageUsageMetrics(); |
+ |
+ // Parses |accept_languages| and returns a set of language codes in |
+ // |languages|. |
+ static void ParseAcceptLanguages(const std::string& accept_languages, |
+ std::set<Language>* languages); |
+ |
+ // Parses |locale| and returns the language code. Returns UNKNOWN_LANGUAGE in |
+ // case of errors. |
+ static Language ToLanguage(const std::string& locale); |
+ |
+ FRIEND_TEST_ALL_PREFIXES(LanguageUsageMetricsTest, ParseAcceptLanguages); |
+ FRIEND_TEST_ALL_PREFIXES(LanguageUsageMetricsTest, ToLanguage); |
+}; |
+ |
+#endif // CHROME_BROWSER_LANGUAGE_USAGE_METRICS_H_ |