Replace ToLower calls to the new format

components/storage_monitor/media_storage_util.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 "components/storage_monitor/media_storage_util.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file_util.h"
@@ skipping 81 matching lines @@
 }  // namespace
 
 // static
 bool MediaStorageUtil::HasDcim(const base::FilePath& mount_point) {
   DCHECK(!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 
   base::FilePath::StringType dcim_dir(kDCIMDirectoryName);
   if (!base::DirectoryExists(mount_point.Append(dcim_dir))) {
     // Check for lowercase 'dcim' as well.
     base::FilePath dcim_path_lower(
-        mount_point.Append(base::StringToLowerASCII(dcim_dir)));
+        mount_point.Append(base::ToLowerASCII(dcim_dir)));
     if (!base::DirectoryExists(dcim_path_lower))
       return false;
   }
   return true;
 }
 
 // static
 bool MediaStorageUtil::CanCreateFileSystem(const std::string& device_id,
                                            const base::FilePath& path) {
   StorageInfo::Type type;
@@ skipping 128 matching lines @@
       StorageMonitor::GetInstance()->GetAllAvailableStorages();
   for (StorageInfoList::const_iterator it = devices.begin();
        it != devices.end(); ++it) {
     if (StorageInfo::IsRemovableDevice(id) && it->device_id() == id)
       return true;
   }
   return false;
 }
 
 }  // namespace storage_monitor