Update ToLower/UpperASCII API

storage/common/fileapi/file_system_util.cc

Index: storage/common/fileapi/file_system_util.cc
diff --git a/storage/common/fileapi/file_system_util.cc b/storage/common/fileapi/file_system_util.cc
index 98b6cc81a4be8f51a0124bcde7607de1d58b7d88..16d74e44427dc58e683ff880f37bc06cae0cd32a 100644
--- a/storage/common/fileapi/file_system_util.cc
+++ b/storage/common/fileapi/file_system_util.cc
@@ -420,8 +420,8 @@ bool CrackIsolatedFileSystemName(const std::string& filesystem_name,
   // names, so we do a case insensitive compare by converting both strings
   // to uppercase.
   // TODO(benwells): Remove this when WebKit uses the same constant.
-  start_token = base::StringToUpperASCII(start_token);
-  std::string filesystem_name_upper = base::StringToUpperASCII(filesystem_name);
+  start_token = base::ToUpperASCII(start_token);
+  std::string filesystem_name_upper = base::ToUpperASCII(filesystem_name);
   size_t pos = filesystem_name_upper.find(start_token);
   if (pos == std::string::npos)
     return false;