Add a "native_support" service.

services/native_support/process_controller_impl.h

Index: services/native_support/process_controller_impl.h
diff --git a/services/native_support/process_controller_impl.h b/services/native_support/process_controller_impl.h
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+// 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 SERVICES_NATIVE_SUPPORT_PROCESS_CONTROLLER_IMPL_H_
+#define SERVICES_NATIVE_SUPPORT_PROCESS_CONTROLLER_IMPL_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "base/process/process.h"
+#include "base/task_runner.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "mojo/services/files/public/interfaces/file.mojom.h"
+#include "mojo/services/files/public/interfaces/types.mojom.h"
+#include "mojo/services/native_support/public/interfaces/process.mojom.h"
+
+namespace native_support {
+
+class ProcessIORedirection;
+
+class ProcessControllerImpl : public ProcessController {
+ public:
+  ProcessControllerImpl(
+      scoped_refptr<base::TaskRunner> worker_runner,
+      mojo::InterfaceRequest<ProcessController> request,
+      base::Process process,
+      std::unique_ptr<ProcessIORedirection> process_io_redirection);
+  ~ProcessControllerImpl() override;
+
+  // |ProcessController| implementation:
+  void Wait(const WaitCallback& callback) override;
+  void Kill(int32_t signal, const KillCallback& callback) override;
+
+ private:
+  void OnWaitComplete(const WaitCallback& callback,
+                      mojo::files::Error result,
+                      int32_t exit_status);
+
+  mojo::files::Error KillHelper(int32_t signal);
+
+  scoped_refptr<base::TaskRunner> worker_runner_;
+  mojo::StrongBinding<ProcessController> binding_;
+  base::Process process_;
+  std::unique_ptr<ProcessIORedirection> process_io_redirection_;
+
+  base::WeakPtrFactory<ProcessControllerImpl> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProcessControllerImpl);
+};
+
+}  // namespace native_support
+
+#endif  // SERVICES_NATIVE_SUPPORT_PROCESS_CONTROLLER_IMPL_H_