Replace ToLower calls to the new format

chrome/browser/extensions/api/music_manager_private/device_id_linux.cc

 // Copyright 2013 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/browser/extensions/api/music_manager_private/device_id.h"
 
 #include <sys/socket.h>  // Must be included before ifaddrs.h.
 #include <ifaddrs.h>
 #include <net/if.h>
 #include <sys/ioctl.h>
@@ skipping 106 matching lines @@
     const char* mac_address =
         static_cast<const char*>(ifinfo.ifr_hwaddr.sa_data);
     if (!is_valid_mac_address_.Run(mac_address, MAC_LENGTH))
       return true;
 
     if (!IsValidPrefix(ifinfo.ifr_name, prefixes, prefixes_count))
       return true;
 
     // Got one!
     found_mac_address_ =
-        base::StringToLowerASCII(base::HexEncode(mac_address, MAC_LENGTH));
+        base::ToLowerASCII(base::HexEncode(mac_address, MAC_LENGTH));
     return false;
   }
 
   std::string mac_address() const { return found_mac_address_; }
 
  private:
   bool IsValidPrefix(const char* name,
                      const char* const prefixes[],
                      size_t prefixes_count) {
     for (size_t i = 0; i < prefixes_count; i++) {
@@ skipping 59 matching lines @@
   content::BrowserThread::PostTask(
       content::BrowserThread::FILE,
       FROM_HERE,
       base::Bind(GetRawDeviceIdImpl,
           base::Bind(DeviceId::IsValidMacAddress),
           callback));
 }
 
 }  // namespace api
 }  // namespace extensions