Added and replaced some UMAs

chrome/browser/language_usage_metrics.h

Index: chrome/browser/language_usage_metrics.h
diff --git a/chrome/browser/language_usage_metrics.h b/chrome/browser/language_usage_metrics.h
index 72bfec53f85017655e722f7c1c7162907c12af38..13f1337c64ab80ab4c286086c1b09802700033f3 100644
--- a/chrome/browser/language_usage_metrics.h
+++ b/chrome/browser/language_usage_metrics.h
@@ -11,7 +11,6 @@
 #include "base/gtest_prod_util.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
@@ -35,17 +34,7 @@ class LanguageUsageMetrics {
   static void ParseAcceptLanguages(const std::string& accept_languages,
                                    std::set<int>* languages);
 
-  // Parses |locale| and returns the language code. Returns 0 in case of errors.
-  // The language code is calculated from two alphabets. For example, if
-  // |locale| is 'en' which represents 'English', the codes of 'e' and 'n' are
-  // 101 and 110 respectively, and the language code will be 101 * 256 + 100 =
-  // 25966.
-  // |locale| should consist of only lower-case letters. This function doesn't
-  // check whether |locale| is valid locale or not strictly.
-  static int ToLanguageCode(const std::string &locale);
-
   FRIEND_TEST_ALL_PREFIXES(LanguageUsageMetricsTest, ParseAcceptLanguages);
-  FRIEND_TEST_ALL_PREFIXES(LanguageUsageMetricsTest, ToLanguageCode);
 };
 
 #endif  // CHROME_BROWSER_LANGUAGE_USAGE_METRICS_H_