Rename mojo::TokenSerializer to mojo::Broker.

mojo/edk/system/parent_token_serializer_state_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_STATE_WIN_H_
-#define MOJO_EDK_SYSTEM_PARENT_TOKEN_SERIALIZER_STATE_WIN_H_
-
-#include "base/compiler_specific.h"
-#include "base/containers/hash_tables.h"
-#include "base/memory/singleton.h"
-#include "base/synchronization/lock.h"
-#include "base/threading/thread.h"
-#include "mojo/edk/embedder/scoped_platform_handle.h"
-#include "mojo/edk/system/system_impl_export.h"
-#include "mojo/edk/system/token_serializer_win.h"
-
-namespace mojo {
-namespace edk {
-
-// Common state that has to live in a parent process on Windows. There is one
-// instance of this class in the parent process. This class also implements the
-// TokenSerializer interface for use by code in the parent process.
-class MOJO_SYSTEM_IMPL_EXPORT ParentTokenSerializerState
-    : NON_EXPORTED_BASE(public TokenSerializer) {
- public:
-  static ParentTokenSerializerState* GetInstance();
-
-  // TokenSerializer implementation.
-  void CreatePlatformChannelPair(ScopedPlatformHandle* server,
-                                 ScopedPlatformHandle* client) override;
-  void HandleToToken(const PlatformHandle* platform_handles,
-                     size_t count,
-                     uint64_t* tokens) override;
-  void TokenToHandle(const uint64_t* tokens,
-                     size_t count,
-                     PlatformHandle* handles) override;
-
-  scoped_refptr<base::TaskRunner> token_serialize_thread() {
-    return token_serialize_thread_.task_runner();
-  }
-
- private:
-  friend struct base::DefaultSingletonTraits<ParentTokenSerializerState>;
-
-  ParentTokenSerializerState();
-  ~ParentTokenSerializerState() override;
-
-  // A separate thread to handle sync IPCs from child processes for exchanging
-  // platform handles with tokens. We use a separate thread because latency is
-  // very sensitive (since any time a pipe is created or sent, a child process
-  // makes a sync call to this class).
-  base::Thread token_serialize_thread_;
-
-  // Used in the parent (unsandboxed) process to hold a mapping between HANDLES
-  // and tokens. When a child process wants to send a HANDLE to another process,
-  // it exchanges it to a token and then the other process exchanges that token
-  // back to a HANDLE.
-  base::Lock lock_;  // Guards access to below.
-  base::hash_map<uint64_t, HANDLE> token_map_;
-};
-
-}  // namespace edk
-}  // namespace mojo
-
-#endif  // MOJO_EDK_SYSTEM_PARENT_TOKEN_SERIALIZER_STATE_WIN_H_