Convert remaining StringToLowerASCII to ToLowerASCII

media/base/mime_util.cc

Index: media/base/mime_util.cc
diff --git a/media/base/mime_util.cc b/media/base/mime_util.cc
index 50a99c62f61c4a8713644595338f7a137cd41978..2eaf20619a890d4a9937816f330e1fdddd42435a 100644
--- a/media/base/mime_util.cc
+++ b/media/base/mime_util.cc
@@ -396,8 +396,7 @@ void MimeUtil::InitializeMimeTypeMaps() {
 }
 
 bool MimeUtil::IsSupportedMediaMimeType(const std::string& mime_type) const {
-  return media_map_.find(base::StringToLowerASCII(mime_type)) !=
-         media_map_.end();
+  return media_map_.find(base::ToLowerASCII(mime_type)) != media_map_.end();
 }
 
 
@@ -439,14 +438,14 @@ void MimeUtil::ParseCodecString(const std::string& codecs,
 }
 
 bool MimeUtil::IsStrictMediaMimeType(const std::string& mime_type) const {
-  return strict_format_map_.find(base::StringToLowerASCII(mime_type)) !=
+  return strict_format_map_.find(base::ToLowerASCII(mime_type)) !=
          strict_format_map_.end();
 }
 
 SupportsType MimeUtil::IsSupportedStrictMediaMimeType(
     const std::string& mime_type,
     const std::vector<std::string>& codecs) const {
-  const std::string mime_type_lower_case = base::StringToLowerASCII(mime_type);
+  const std::string mime_type_lower_case = base::ToLowerASCII(mime_type);
   StrictMappings::const_iterator it_strict_map =
       strict_format_map_.find(mime_type_lower_case);
   if (it_strict_map == strict_format_map_.end())