Added and replaced some UMAs

chrome/common/metrics/metrics_util.cc

 // Copyright (c) 2012 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/common/metrics/metrics_util.h"
 
 #include "base/sha1.h"
+#include "base/string_util.h"
+#include "base/strings/string_tokenizer.h"
 #include "base/sys_byteorder.h"
 
 namespace metrics {
 
 uint32 HashName(const std::string& name) {
   // SHA-1 is designed to produce a uniformly random spread in its output space,
   // even for nearly-identical inputs.
   unsigned char sha1_hash[base::kSHA1Length];
   base::SHA1HashBytes(reinterpret_cast<const unsigned char*>(name.c_str()),
                       name.size(),
                       sha1_hash);
 
   uint32 bits;
   COMPILE_ASSERT(sizeof(bits) < sizeof(sha1_hash), need_more_data);
   memcpy(&bits, sha1_hash, sizeof(bits));
 
   return base::ByteSwapToLE32(bits);
 }
 
+int ToLanguageCode(const std::string& locale) {
+  base::StringTokenizer parts(locale, "-_");
+  if (!parts.GetNext())
+    return 0;
+
+  std::string language_part = parts.token();
+  StringToLowerASCII(&language_part);
+
+  int language_code = 0;
+  for (std::string::iterator it = language_part.begin();
+       it != language_part.end(); ++it) {
+    char ch = *it;
+    if (ch < 'a' || 'z' < ch)
+      return 0;
+
+    language_code <<= 8;
+    language_code += ch;
+  }
+
+  return language_code;
+}
+
 }  // namespace metrics