Update Crashpad to b47bf6c250c6b825dee1c5fbad9152c2c962e828

third_party/crashpad/crashpad/util/win/registration_protocol_win.h

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 64 matching lines @@
   uint64_t token;
 };
 
 //! \brief The message passed from client to server by
 //!     SendToCrashHandlerServer().
 struct ClientToServerMessage {
   //! \brief Indicates which field of the union is in use.
   enum Type : uint32_t {
     //! \brief For RegistrationRequest.
     kRegister,
+
     //! \brief For ShutdownRequest.
     kShutdown,
+
+    //! \brief An empty message sent by the initial client in asynchronous mode.
+    //!     No data is required, this just confirms that the server is ready to
+    //!     accept client registrations.
+    kPing,
   } type;
 
   union {
     RegistrationRequest registration;
     ShutdownRequest shutdown;
   };
 };
 
 //! \brief A client registration response.
 struct RegistrationResponse {
@@ skipping 24 matching lines @@
 //!     server, storing the server's reply into \a response.
 //!
 //! Typically clients will not use this directly, instead using
 //! CrashpadClient::SetHandler().
 //!
 //! \sa CrashpadClient::SetHandler()
 bool SendToCrashHandlerServer(const base::string16& pipe_name,
                               const ClientToServerMessage& message,
                               ServerToClientMessage* response);
 
+//! \brief Wraps CreateNamedPipe() to create a single named pipe instance.
+//!
+//! \param[in] pipe_name The name to use for the pipe.
+//! \param[in] first_instance If `true`, the named pipe instance will be
+//!     created with `FILE_FLAG_FIRST_PIPE_INSTANCE`. This ensures that the the
+//!     pipe name is not already in use when created. The first instance will be
+//!     created with an untrusted integrity SACL so instances of this pipe can
+//!     be connected to by processes of any integrity level.
+HANDLE CreateNamedPipeInstance(const std::wstring& pipe_name,
+                               bool first_instance);
+
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_WIN_REGISTRATION_PROTOCOL_WIN_H_