win: Add and use a custom CaptureContext() implementation

client/simulate_crash_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,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #ifndef CRASHPAD_CLIENT_SIMULATE_CRASH_WIN_H_
 #define CRASHPAD_CLIENT_SIMULATE_CRASH_WIN_H_
 
 #include <windows.h>
 
 #include "client/crashpad_client.h"
+#include "util/win/capture_context.h"
 
 //! \brief Captures the CPU context and captures a dump without an exception.
 #define CRASHPAD_SIMULATE_CRASH()                        \
   do {                                                   \
     CONTEXT context;                                     \
-    RtlCaptureContext(&context);                         \
+    crashpad::CaptureContext(&context);                  \
     crashpad::CrashpadClient::DumpWithoutCrash(context); \
   } while (false)
 
 #endif  // CRASHPAD_CLIENT_SIMULATE_CRASH_WIN_H_