Remove legacy StartsWithASCII function.

storage/browser/fileapi/obfuscated_file_util.cc

Index: storage/browser/fileapi/obfuscated_file_util.cc
diff --git a/storage/browser/fileapi/obfuscated_file_util.cc b/storage/browser/fileapi/obfuscated_file_util.cc
index 34c0718f6bb8320388ed685df51e129732976453..d46078e85f6e2c12ec4b2d8ac9ecf804c4aaa29a 100644
--- a/storage/browser/fileapi/obfuscated_file_util.cc
+++ b/storage/browser/fileapi/obfuscated_file_util.cc
@@ -901,7 +901,8 @@ void ObfuscatedFileUtil::CloseFileSystemForOriginAndType(
   const std::string key_prefix = GetDirectoryDatabaseKey(origin, type_string);
   for (DirectoryMap::iterator iter = directories_.lower_bound(key_prefix);
        iter != directories_.end();) {
-    if (!base::StartsWithASCII(iter->first, key_prefix, true))
+    if (!base::StartsWith(iter->first, key_prefix,
+                          base::CompareCase::SENSITIVE))
       break;
     DCHECK(type_string.empty() || iter->first == key_prefix);
     scoped_ptr<SandboxDirectoryDatabase> database(iter->second);
@@ -925,7 +926,8 @@ void ObfuscatedFileUtil::DestroyDirectoryDatabase(
   const std::string key_prefix = GetDirectoryDatabaseKey(origin, type_string);
   for (DirectoryMap::iterator iter = directories_.lower_bound(key_prefix);
        iter != directories_.end();) {
-    if (!base::StartsWithASCII(iter->first, key_prefix, true))
+    if (!base::StartsWith(iter->first, key_prefix,
+                          base::CompareCase::SENSITIVE))
       break;
     DCHECK(type_string.empty() || iter->first == key_prefix);
     scoped_ptr<SandboxDirectoryDatabase> database(iter->second);