Move //mojo/shell to //shell

mojo/shell/child_process_host.h

-// Copyright 2014 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_CHILD_PROCESS_HOST_H_
-#define MOJO_SHELL_CHILD_PROCESS_HOST_H_
-
-#include "base/macros.h"
-#include "base/process/process_handle.h"
-#include "mojo/edk/embedder/platform_channel_pair.h"
-#include "mojo/edk/embedder/scoped_platform_handle.h"
-#include "mojo/shell/child_process.h"  // For |ChildProcess::Type|.
-
-namespace mojo {
-namespace shell {
-
-class Context;
-
-// (Base) class for a "child process host". Handles launching and connecting a
-// platform-specific "pipe" to the child, and supports joining the child
-// process. Intended for use as a base class, but may be used on its own in
-// simple cases.
-//
-// This class is not thread-safe. It should be created/used/destroyed on a
-// single thread.
-//
-// Note: Does not currently work on Windows before Vista.
-class ChildProcessHost {
- public:
-  class Delegate {
-   public:
-    virtual void WillStart() = 0;
-    virtual void DidStart(bool success) = 0;
-  };
-
-  ChildProcessHost(Context* context,
-                   Delegate* delegate,
-                   ChildProcess::Type type);
-  virtual ~ChildProcessHost();
-
-  // |Start()|s the child process; calls the delegate's |DidStart()| (on the
-  // thread on which |Start()| was called) when the child has been started (or
-  // failed to start). After calling |Start()|, this object must not be
-  // destroyed until |DidStart()| has been called.
-  // TODO(vtl): Consider using weak pointers and removing this requirement.
-  void Start();
-
-  // Waits for the child process to terminate, and returns its exit code.
-  // Note: If |Start()| has been called, this must not be called until the
-  // callback has been called.
-  int Join();
-
-  embedder::ScopedPlatformHandle* platform_channel() {
-    return &platform_channel_;
-  }
-
- protected:
-  Context* context() const {
-    return context_;
-  }
-
- private:
-  bool DoLaunch();
-  void DidLaunch(bool success);
-
-  Context* const context_;
-  Delegate* const delegate_;
-  const ChildProcess::Type type_;
-
-  base::ProcessHandle child_process_handle_;
-
-  embedder::PlatformChannelPair platform_channel_pair_;
-
-  // Platform-specific "pipe" to the child process. Valid immediately after
-  // creation.
-  embedder::ScopedPlatformHandle platform_channel_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChildProcessHost);
-};
-
-}  // namespace shell
-}  // namespace mojo
-
-#endif  // MOJO_SHELL_CHILD_PROCESS_HOST_H_