Replace ToLower calls to the new format

chrome/browser/extensions/api/music_manager_private/device_id_mac.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 <CoreFoundation/CoreFoundation.h>
 #include <DiskArbitration/DASession.h>
 #include <DiskArbitration/DADisk.h>
 #include <IOKit/IOKitLib.h>
@@ skipping 115 matching lines @@
                                             kCFAllocatorDefault,
                                             0)));
     if (!mac_address_data)
       return keep_going;
 
     const UInt8* mac_address = CFDataGetBytePtr(mac_address_data);
     size_t mac_address_size = CFDataGetLength(mac_address_data);
     if (!is_valid_mac_address_.Run(mac_address, mac_address_size))
       return keep_going;
 
-    std::string mac_address_string = base::StringToLowerASCII(base::HexEncode(
+    std::string mac_address_string = base::ToLowerASCII(base::HexEncode(
         mac_address, mac_address_size));
 
     base::ScopedCFTypeRef<CFStringRef> provider_class(
         static_cast<CFStringRef>(
             IORegistryEntryCreateCFProperty(network_controller,
                                             CFSTR(kIOProviderClassKey),
                                             kCFAllocatorDefault,
                                             0)));
     if (provider_class) {
       if (CFStringCompare(provider_class, CFSTR("IOPCIDevice"), 0) ==
@@ skipping 98 matching lines @@
   content::BrowserThread::PostTask(
       content::BrowserThread::FILE,
       FROM_HERE,
       base::Bind(GetRawDeviceIdImpl,
           base::Bind(DeviceId::IsValidMacAddress),
           callback));
 }
 
 }  // namespace api
 }  // namespace extensions