win: Add and use a custom CaptureContext() implementation

client/crashpad_client.h

 // Copyright 2014 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 75 matching lines @@
   //! and upload server.
   //!
   //! \param[in] ipc_port The full name of the crash handler IPC port.
   //!
   //! \return `true` on success and `false` on failure.
   bool SetHandler(const std::string& ipc_port);
 
   //! \brief Requests that the handler capture a dump even though there hasn't
   //!     been a crash.
   //!
-  //! \param[in] context A CONTEXT, generally captured by `RtlCaptureContext()`
-  //!     or similar.
+  //! \param[in] context A `CONTEXT`, generally captured by CaptureContext() or
+  //!     similar.
   static void DumpWithoutCrash(const CONTEXT& context);
 #endif
 
   //! \brief Configures the process to direct its crashes to a Crashpad handler.
   //!
   //! The Crashpad handler must previously have been started by StartHandler()
   //! or configured by SetHandler().
   //!
   //! On Mac OS X, this method sets the task’s exception port for `EXC_CRASH`,
   //! `EXC_RESOURCE`, and `EXC_GUARD` exceptions to the Mach send right obtained
@@ skipping 18 matching lines @@
 #if defined(OS_MACOSX)
   base::mac::ScopedMachSendRight exception_port_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(CrashpadClient);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_CLIENT_CRASHPAD_CLIENT_H_