Adds support for headless chrome embedder mojo services

headless/public/util/black_hole_protocol_handler.cc

+// Copyright 2016 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 "headless/public/util/black_hole_protocol_handler.h"
+
+#include "base/threading/thread_task_runner_handle.h"
+#include "net/base/io_buffer.h"
+#include "net/base/net_errors.h"
+#include "net/url_request/url_request_job.h"
+
+namespace headless {
+namespace {
+class BlackHoleRequestJob : public net::URLRequestJob {
+ public:
+  BlackHoleRequestJob(net::URLRequest* request,
+                      net::NetworkDelegate* network_delegate);
+
+  // net::URLRequestJob implementation:
+  void Start() override;
+  void Kill() override;
+
+ private:
+  ~BlackHoleRequestJob() override;
+
+  void StartAsync();
+
+  base::WeakPtrFactory<BlackHoleRequestJob> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlackHoleRequestJob);
+};
+
+BlackHoleRequestJob::BlackHoleRequestJob(net::URLRequest* request,
+                                         net::NetworkDelegate* network_delegate)
+    : net::URLRequestJob(request, network_delegate), weak_factory_(this) {}
+
+BlackHoleRequestJob::~BlackHoleRequestJob() {}
+
+void BlackHoleRequestJob::Start() {
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE,
+      base::Bind(&BlackHoleRequestJob::StartAsync, weak_factory_.GetWeakPtr()));
+}
+
+void BlackHoleRequestJob::StartAsync() {
+  // Fail every request!
+  NotifyStartError(net::URLRequestStatus(net::URLRequestStatus::FAILED,
+                                         net::ERR_FILE_NOT_FOUND));
+}
+
+void BlackHoleRequestJob::Kill() {
+  weak_factory_.InvalidateWeakPtrs();
+  URLRequestJob::Kill();
+}
+}  // namespace
+
+BlackHoleProtocolHandler::BlackHoleProtocolHandler() {}
+BlackHoleProtocolHandler::~BlackHoleProtocolHandler() {}
+
+net::URLRequestJob* BlackHoleProtocolHandler::MaybeCreateJob(
+    net::URLRequest* request,
+    net::NetworkDelegate* network_delegate) const {
+  return new BlackHoleRequestJob(request, network_delegate);
+}
+
+}  // namespace headless