Add brotli content-encoding filter.

net/filter/brotli_filter_disabled.cc

 // Copyright 2015 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 "ui/base/cursor/cursor_loader.h"
+#include "net/filter/brotli_filter.h"
 
-#include "base/logging.h"
+namespace net {
 
-namespace ui {
-
-CursorLoader* CursorLoader::Create() {
-  NOTIMPLEMENTED();
+Filter* CreateBrotliFilter(Filter::FilterType type_id) {
   return nullptr;
 }
 
-}  // namespace ui
+}  // namespace net