Remove dead code, GetDataMimeType

base/nix/mime_util_xdg.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 "base/nix/mime_util_xdg.h"
 
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/synchronization/lock.h"
 #include "base/third_party/xdg_mime/xdgmime.h"
@@ skipping 11 matching lines @@
 }  // namespace
 
 std::string GetFileMimeType(const FilePath& filepath) {
   if (filepath.empty())
     return std::string();
   ThreadRestrictions::AssertIOAllowed();
   AutoLock scoped_lock(g_mime_util_xdg_lock.Get());
   return xdg_mime_get_mime_type_from_file_name(filepath.value().c_str());
 }
 
-std::string GetDataMimeType(const std::string& data) {
-  ThreadRestrictions::AssertIOAllowed();
-  AutoLock scoped_lock(g_mime_util_xdg_lock.Get());
-  return xdg_mime_get_mime_type_for_data(data.data(), data.length(), NULL);
-}
-
 }  // namespace nix
 }  // namespace base