Adds ability for chrome to behave as mojo_runner

mojo/shell/native_runner_delegate.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 MOJO_SHELL_NATIVE_RUNNER_DELEGATE_H_
+#define MOJO_SHELL_NATIVE_RUNNER_DELEGATE_H_
+
+namespace base {
+class CommandLine;
+}
+
+namespace mojo {
+namespace shell {
+
+class Identity;
+
+class NativeRunnerDelegate {
+ public:
+  // Called to adjust the commandline for launching the specified app.
+  // WARNING: this is called on a background thread.
+  virtual void AdjustCommandLineArgumentsForTarget(
+      const Identity& target,
+      base::CommandLine* command_line) = 0;
+
+ protected:
+  virtual ~NativeRunnerDelegate() {}
+};
+
+}  // namespace shell
+}  // namespace mojo
+
+#endif  // MOJO_SHELL_NATIVE_RUNNER_DELEGATE_H_