Add HttpProtocolHandler and convert everything to use it

headless/lib/browser/headless_url_request_context_getter.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/lib/browser/headless_url_request_context_getter.h"
 
 #include <memory>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 163 matching lines @@
     storage_->set_host_resolver(std::move(host_resolver));
     network_session_params.host_resolver =
         url_request_context_->host_resolver();
 
     storage_->set_http_network_session(
         base::WrapUnique(new net::HttpNetworkSession(network_session_params)));
     storage_->set_http_transaction_factory(base::WrapUnique(new net::HttpCache(
         storage_->http_network_session(), std::move(main_backend),
         true /* set_up_quic_server_info */)));
 
-    std::unique_ptr<net::URLRequestJobFactoryImpl> job_factory(
-        new net::URLRequestJobFactoryImpl());
+    std::unique_ptr<net::URLRequestJobFactoryImpl> job_factory =
+        net::URLRequestJobFactoryImpl::CreateWithDefaultProtocolHandlers();
 
     InstallProtocolHandlers(job_factory.get(), &protocol_handlers_);
     bool set_protocol = job_factory->SetProtocolHandler(
         url::kDataScheme, base::WrapUnique(new net::DataProtocolHandler));
     DCHECK(set_protocol);
     set_protocol = job_factory->SetProtocolHandler(
         url::kFileScheme,
         base::WrapUnique(new net::FileProtocolHandler(
             content::BrowserThread::GetBlockingPool()
                 ->GetTaskRunnerWithShutdownBehavior(
@@ skipping 21 matching lines @@
 HeadlessURLRequestContextGetter::GetNetworkTaskRunner() const {
   return content::BrowserThread::GetMessageLoopProxyForThread(
       content::BrowserThread::IO);
 }
 
 net::HostResolver* HeadlessURLRequestContextGetter::host_resolver() const {
   return url_request_context_->host_resolver();
 }
 
 }  // namespace headless