Reland: Adding container class for chromoting client runtimes.

Reland http://crrev.com/1764503002 with fixes for the Android app and
tests:

* Initialize ChromotingClientRuntime::ui_task_runner_
* Add new unittest to GN build.
* Don't call MessageLoopForUI::Start() in Android test.

TBR=nicholss

Review URL: https://codereview.chromium.org/1827573002

Cr-Commit-Position: refs/heads/master@{#382757}

1 files changed, 89 insertions, 0 deletions

diff --git a/remoting/client/chromoting_client_runtime.h b/remoting/client/chromoting_client_runtime.h
new file mode 100644
index 0000000..b9c45b6
--- /dev/null
+++ b/remoting/client/chromoting_client_runtime.h
@@ -0,0 +1,89 @@
+// 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 "net/url_request/url_request_context_getter.h"
+#include "remoting/base/auto_thread.h"
+
+namespace base {
+class MessageLoopForUI;
+}  // namespace base
+
+// Houses the global resources on which the Chromoting components run
+// (e.g. message loops and task runners).
+namespace remoting {
+
+class ChromotingClientRuntime {
+ public:
+  // Caller to create is responsible for creating and attaching a new ui thread
+  // for use. Example:
+  //
+  // On Android, the UI thread is managed by Java, so we need to attach and
+  // start a special type of message loop to allow Chromium code to run tasks.
+  //
+  //  base::MessageLoopForUI *ui_loop = new base::MessageLoopForUI();
+  //  ui_loop_->Start();
+  //  scoped_ptr<ChromotingClientRuntime> runtime =
+  //    ChromotingClientRuntime::Create(ui_loop);
+  //
+  // On iOS we created a new message loop and now attach it.
+  //
+  //  base::MessageLoopForUI *ui_loop = new base::MessageLoopForUI();
+  //  ui_loop_->Attach();
+  //  scoped_ptr<ChromotingClientRuntime> runtime =
+  //    ChromotingClientRuntime::Create(ui_loop);
+  //
+  static scoped_ptr<ChromotingClientRuntime> Create(
+      base::MessageLoopForUI* ui_loop);
+
+  ~ChromotingClientRuntime();
+
+  scoped_refptr<AutoThreadTaskRunner> network_task_runner() {
+    return network_task_runner_;
+  }
+
+  scoped_refptr<AutoThreadTaskRunner> ui_task_runner() {
+    return ui_task_runner_;
+  }
+
+  scoped_refptr<AutoThreadTaskRunner> display_task_runner() {
+    return display_task_runner_;
+  }
+
+  scoped_refptr<AutoThreadTaskRunner> file_task_runner() {
+    return file_task_runner_;
+  }
+
+  scoped_refptr<net::URLRequestContextGetter> url_requester() {
+    return url_requester_;
+  }
+
+ private:
+  ChromotingClientRuntime();
+  ChromotingClientRuntime(
+      scoped_refptr<AutoThreadTaskRunner> ui_task_runner,
+      scoped_refptr<AutoThreadTaskRunner> display_task_runner,
+      scoped_refptr<AutoThreadTaskRunner> network_task_runner,
+      scoped_refptr<AutoThreadTaskRunner> file_task_runner,
+      scoped_refptr<net::URLRequestContextGetter> url_requester);
+
+  // References to native threads.
+  scoped_refptr<AutoThreadTaskRunner> ui_task_runner_;
+
+  scoped_refptr<AutoThreadTaskRunner> display_task_runner_;
+  scoped_refptr<AutoThreadTaskRunner> network_task_runner_;
+  scoped_refptr<AutoThreadTaskRunner> file_task_runner_;
+
+  scoped_refptr<net::URLRequestContextGetter> url_requester_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromotingClientRuntime);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_CHROMOTING_CLIENT_RUNTIME_H_