Rename mojo::TokenSerializer to mojo::Broker.

mojo/edk/system/parent_token_serializer_win.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 MOJO_EDK_SYSTEM_PARENT_TOKEN_SERIALIZER_WIN_H_
-#define MOJO_EDK_SYSTEM_PARENT_TOKEN_SERIALIZER_WIN_H_
-
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/message_loop/message_loop.h"
-#include "mojo/edk/embedder/scoped_platform_handle.h"
-#include "mojo/edk/system/system_impl_export.h"
-
-namespace mojo {
-namespace edk {
-
-// Responds to requests from a child process to exchange handles to tokens and
-// vice versa. There is one object of this class per child process host object.
-// This object will delete itself when it notices that the pipe is broken.
-class MOJO_SYSTEM_IMPL_EXPORT ParentTokenSerializer
-    : NON_EXPORTED_BASE(public base::MessageLoopForIO::IOHandler) {
- public:
-  // |child_process| is a handle to the child process. It's not owned by this
-  // class but is guaranteed to be alive as long as the child process is
-  // running. |pipe| is a handle to the communication pipe to the child process,
-  // which is generated inside mojo::edk::ChildProcessLaunched. It is owned by
-  // this class.
-  ParentTokenSerializer(HANDLE child_process, ScopedPlatformHandle pipe);
-
- private:
-  ~ParentTokenSerializer() override;
-
-  void RegisterIOHandler();
-  void BeginRead();
-
-  void OnIOCompleted(base::MessageLoopForIO::IOContext* context,
-                     DWORD bytes_transferred,
-                     DWORD error) override;
-
-  // Helper wrappers around DuplicateHandle.
-  HANDLE DuplicateToChild(HANDLE handle);
-  HANDLE DuplicateFromChild(HANDLE handle);
-
-  HANDLE child_process_;
-  ScopedPlatformHandle pipe_;
-  base::MessageLoopForIO::IOContext read_context_;
-  base::MessageLoopForIO::IOContext write_context_;
-
-  std::vector<char> read_data_;
-  // How many bytes in read_data_ we already read.
-  uint32_t num_bytes_read_;
-  std::vector<char> write_data_;
-};
-
-}  // namespace edk
-}  // namespace mojo
-
-#endif  // MOJO_EDK_SYSTEM_PARENT_TOKEN_SERIALIZER_WIN_H_