Replace ToLower calls to the new format

chrome/browser/media_galleries/fileapi/media_path_filter.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/browser/media_galleries/fileapi/media_path_filter.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
@@ skipping 134 matching lines @@
 MediaPathFilter::~MediaPathFilter() {
 }
 
 bool MediaPathFilter::Match(const base::FilePath& path) {
   return GetType(path) != MEDIA_GALLERY_SCAN_FILE_TYPE_UNKNOWN;
 }
 
 MediaGalleryScanFileType MediaPathFilter::GetType(const base::FilePath& path) {
   EnsureInitialized();
   MediaFileExtensionMap::const_iterator it =
-      media_file_extensions_map_.find(
-          base::StringToLowerASCII(path.Extension()));
+      media_file_extensions_map_.find(base::ToLowerASCII(path.Extension()));
   if (it == media_file_extensions_map_.end())
     return MEDIA_GALLERY_SCAN_FILE_TYPE_UNKNOWN;
   return static_cast<MediaGalleryScanFileType>(it->second);
 }
 
 void MediaPathFilter::EnsureInitialized() {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
   if (initialized_)
     return;
 
@@ skipping 38 matching lines @@
 }
 
 void MediaPathFilter::AddExtensionToMediaFileExtensionMap(
     const base::FilePath::CharType* extension,
     MediaGalleryScanFileType type) {
   base::FilePath::StringType extension_with_sep =
       base::FilePath::kExtensionSeparator +
       base::FilePath::StringType(extension);
   media_file_extensions_map_[extension_with_sep] |= type;
 }