Move more string_util functions to base namespace.

device/udev_linux/udev.cc

 // 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.
 
 #include "device/udev_linux/udev.h"
 
 #include "base/strings/string_util.h"
 #include "device/udev_linux/udev_loader.h"
 
 namespace device {
@@ skipping 153 matching lines @@
                                       const char* key) {
   return StringOrEmptyIfNull(udev_device_get_sysattr_value(udev_device, key));
 }
 
 std::string UdevDecodeString(const std::string& encoded) {
   std::string decoded;
   const size_t size = encoded.size();
   for (size_t i = 0; i < size; ++i) {
     char c = encoded[i];
     if ((i + 3 < size) && c == '\\' && encoded[i + 1] == 'x') {
-      c = (HexDigitToInt(encoded[i + 2]) << 4) +
-          HexDigitToInt(encoded[i + 3]);
+      c = (base::HexDigitToInt(encoded[i + 2]) << 4) +
+          base::HexDigitToInt(encoded[i + 3]);
       i += 3;
     }
     decoded.push_back(c);
   }
   return decoded;
 }
 
 }  // namespace device