Change AuthenticatingURLLoader to be a URLLoaderInterceptor

shell/authenticating_url_loader_loader.cc

Index: shell/authenticating_url_loader_loader.cc
diff --git a/shell/authenticating_url_loader_loader.cc b/shell/authenticating_url_loader_loader.cc
deleted file mode 100644
index 5a2ae4596e668f75665468df38db9b50ad6d42a4..0000000000000000000000000000000000000000
--- a/shell/authenticating_url_loader_loader.cc
+++ /dev/null
@@ -1,24 +0,0 @@
-// 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 "base/logging.h"
-#include "shell/authenticating_url_loader_loader.h"
-
-namespace shell {
-
-AuthenticatingURLLoaderLoader::AuthenticatingURLLoaderLoader() {
-}
-
-AuthenticatingURLLoaderLoader::~AuthenticatingURLLoaderLoader() {
-}
-
-void AuthenticatingURLLoaderLoader::Load(
-    const GURL& url,
-    mojo::InterfaceRequest<mojo::Application> application_request) {
-  DCHECK(application_request.is_pending());
-  application_.reset(new mojo::ApplicationImpl(&authenticating_url_loader_,
-                                               application_request.Pass()));
-}
-
-}  // namespace shell