Rename mojo::TokenSerializer to mojo::Broker.

mojo/edk/system/child_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_CHILD_TOKEN_SERIALIZER_WIN_H_
-#define MOJO_EDK_SYSTEM_CHILD_TOKEN_SERIALIZER_WIN_H_
-
-#include "base/memory/singleton.h"
-#include "base/synchronization/lock_impl.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 {
-struct TokenSerializerMessage;
-
-// An implementation of TokenSerializer used in (sandboxed) child processes. It
-// talks over sync IPCs to the (unsandboxed) parent process (specifically,
-// ParentTokenSerializer) to convert handles to tokens and vice versa.
-class MOJO_SYSTEM_IMPL_EXPORT ChildTokenSerializer : public TokenSerializer {
- public:
-  static ChildTokenSerializer* GetInstance();
-
-  // Passes the platform handle that is used to talk to ParentTokenSerializer.
-  void SetParentTokenSerializerHandle(ScopedPlatformHandle handle);
-
-  // 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;
-
- private:
-  friend struct base::DefaultSingletonTraits<ChildTokenSerializer>;
-
-  ChildTokenSerializer();
-  ~ChildTokenSerializer() override;
-
-  // Helper method to write the given message and read back the result.
-  bool WriteAndReadResponse(TokenSerializerMessage* message,
-                            void* response,
-                            uint32_t response_size);
-
-  // Guards access to below.
-  // We use LockImpl instead of Lock because the latter adds thread checking
-  // that we don't want (since we lock in the constructor and unlock on another
-  // thread.
-  base::internal::LockImpl lock_;
-  ScopedPlatformHandle handle_;
-};
-
-}  // namespace edk
-}  // namespace mojo
-
-#endif  // MOJO_EDK_SYSTEM_CHILD_TOKEN_SERIALIZER_WIN_H_