win: Capture some memory pointed at by context

snapshot/win/thread_snapshot_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 58 matching lines @@
   union {
     CPUContextX86 x86;
     CPUContextX86_64 x86_64;
   } context_union_;
 #endif
   CPUContext context_;
   MemorySnapshotWin stack_;
   internal::MemorySnapshotWin teb_;
   ProcessReaderWin::Thread thread_;
   InitializationStateDcheck initialized_;
+  PointerVector<internal::MemorySnapshotWin> pointed_to_memory_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadSnapshotWin);
 };
 
 }  // namespace internal
 }  // namespace crashpad
 
 #endif  // CRASHPAD_SNAPSHOT_WIN_THREAD_SNAPSHOT_WIN_H_