refactor: create request context from network context (#14656)

* [ci skip] refactor: create request context from network context

* [ci skip] refactor: subscribe to mojo cookiemanager for cookie changes

* [ci skip] refactor: manage the lifetime of custom URLRequestJobFactory

* refactor: use OOP mojo proxy resolver

* revert: add support for kIgnoreCertificateErrorsSPKIList

* build: provide service manifest overlays for content services

* chore: gn format

* fix: log-net-log switch not working as expected

* spec: verify proxy settings are respected from pac script with session.setProxy

* chore: use chrome constants where possible

* fix: initialize request context for global cert fetcher

* refactor: fix destruction of request context getters

* spec: use custom session for proxy tests

* fix: queue up additional stop callbacks while net log is being stopped

* fix: Add CHECK for cookie manager retrieval

* chore: add helper to retrieve logging state for net log module

* fix: ui::ResourceBundle::GetRawDataResourceForScale => GetRawDataResource

* style: comment unused parameters

* build: move //components/certificate_transparency deps from //brightray

* chore: update gritsettings_resource_ids patch

* chore: update api for chromium 68

* fix: net log instance is now a property of session

atom/browser/io_thread.h

@@ -0,0 +1,51 @@
+// Copyright (c) 2017 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_IO_THREAD_H_
+#define ATOM_BROWSER_IO_THREAD_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/scoped_refptr.h"
+#include "content/public/browser/browser_thread_delegate.h"
+
+namespace net {
+class URLRequestContext;
+class URLRequestContextGetter;
+}  // namespace net
+
+namespace net_log {
+class ChromeNetLog;
+}
+
+namespace atom {
+
+class IOThread : public content::BrowserThreadDelegate {
+ public:
+  explicit IOThread(net_log::ChromeNetLog* net_log);
+  ~IOThread() override;
+
+  net::URLRequestContextGetter* GetRequestContext() {
+    return url_request_context_getter_.get();
+  }
+
+ protected:
+  // BrowserThreadDelegate Implementation, runs on the IO thread.
+  void Init() override;
+  void CleanUp() override;
+
+ private:
+  // The NetLog is owned by the browser process, to allow logging from other
+  // threads during shutdown, but is used most frequently on the IOThread.
+  net_log::ChromeNetLog* net_log_;
+  std::unique_ptr<net::URLRequestContext> url_request_context_;
+  scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
+
+  DISALLOW_COPY_AND_ASSIGN(IOThread);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_IO_THREAD_H_