Allow Chrome to bind an Application request from mojo_runner.

chrome/browser/mojo_runner_state.h

+// Copyright 2015 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 CHROME_BROWSER_MOJO_RUNNER_STATE_H_
+#define CHROME_BROWSER_MOJO_RUNNER_STATE_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace mojo {
+class ApplicationImpl;
+namespace runner {
+class RunnerConnection;
+}
+}
+
+class ChromeApplicationDelegate;
+
+// Creating an instance of this class blocks the calling thread until a

[sky, 2015/11/05 19:21:28]

nit: have constructor just setup state and Init() or Run() do the blocking.

+// connection to the spawning mojo_runner is established, an Application
+// request from it is bound, and the Initialize() method on that
+// application is called.
+// TODO(beng): figure out if/how this should be exposed to other layers
+//             of code in Chrome.
+class MojoRunnerState {
+ public:
+  MojoRunnerState();
+  ~MojoRunnerState();
+
+ private:
+  scoped_ptr<mojo::runner::RunnerConnection> runner_connection_;
+  scoped_ptr<mojo::ApplicationImpl> application_impl_;
+  scoped_ptr<ChromeApplicationDelegate> application_delegate_;

[sky, 2015/11/05 19:21:28]

You need to forward declare ChromeApplicationDelegate.

+
+  DISALLOW_COPY_AND_ASSIGN(MojoRunnerState);
+};
+
+#endif  // CHROME_BROWSER_MOJO_RUNNER_STATE_H_