Revert of Convert network hints to Mojo

components/network_hints/browser/BUILD.gn

 # Copyright 2014 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.
 
 # GYP version: components/network_hints.gypi:network_hints_browser
 source_set("browser") {
   sources = [
-    "network_hints_impl.cc",
-    "network_hints_impl.h",
+    "network_hints_message_filter.cc",
+    "network_hints_message_filter.h",
   ]
 
   public_deps = [
     "//base",
     "//components/network_hints/common",
-    "//components/network_hints/public/interfaces:network_hints_mojom",
     "//content/public/browser",
     "//ipc",
     "//net",
   ]
 }