Adding container class for chromoting client runtimes.

remoting/client/chromoting_client_runtime.h

+// 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.
+
+#ifndef REMOTING_CLIENT_CHROMOTING_CLIENT_RUNTIME_H_
+#define REMOTING_CLIENT_CHROMOTING_CLIENT_RUNTIME_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "net/url_request/url_request_context_getter.h"
+#include "remoting/base/auto_thread.h"
+
+namespace base {
+template<typename T> struct DefaultSingletonTraits;
+}
+
+// Houses the global resources on which the Chromoting components run
+// (e.g. message loops and task runners).
+namespace remoting {
+
+class ChromotingClientRuntime {
+ public:
+  // This class is instantiated at process initialization and persists until
+  // we close. Its components are reused across |ChromotingClientRuntime|s.
+  static ChromotingClientRuntime* GetInstance();
+
+  scoped_refptr<AutoThreadTaskRunner> network_task_runner() {
+    return network_task_runner_;
+  }
+
+  scoped_refptr<AutoThreadTaskRunner> display_task_runner() {
+    return ui_task_runner_;
+  }
+
+  scoped_refptr<AutoThreadTaskRunner> file_task_runner() {
+    return file_task_runner_;
+  }
+
+  scoped_refptr<net::URLRequestContextGetter> url_requester() {
+    return url_requester_;
+  }
+
+protected:
+  ChromotingClientRuntime();
+  // Forces a DisconnectFromHost() in case there is any active or failed
+  // connection, then proceeds to tear down the Chromium dependencies on which
+  // all sessions depended. Because destruction only occurs at application exit
+  // after all connections have terminated, it is safe to make unretained
+  // cross-thread calls on the class.
+  virtual ~ChromotingClientRuntime();
+
+ private:
+  // Chromium code's connection to the app message loop. Once created the
+  // MessageLoop will live for the life of the program.
+  base::MessageLoop* ui_loop_;
+
+  // References to native threads.
+  scoped_refptr<AutoThreadTaskRunner> ui_task_runner_;
+  scoped_refptr<AutoThreadTaskRunner> network_task_runner_;
+  scoped_refptr<AutoThreadTaskRunner> file_task_runner_;
+
+  scoped_refptr<net::URLRequestContextGetter> url_requester_;
+
+  friend struct base::DefaultSingletonTraits<ChromotingClientRuntime>;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromotingClientRuntime);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_CHROMOTING_CLIENT_RUNTIME_H_