Keep only base/extractor.[cc|h].

base/exception_barrier_lowlevel.asm

-; Copyright 2006-2009 Google Inc.
-;
-; 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.
-; ========================================================================
-;
-; Tag the exception handler as an SEH handler in case the executable
-; is linked with /SAFESEH (which is the default).
-;
-; MASM 8.0 inserts an additional leading underscore in front of names
-; and this is an attempted fix until we understand why.
-IF @version LT 800
-_ExceptionBarrierHandler PROTO
-.SAFESEH _ExceptionBarrierHandler
-ELSE
-ExceptionBarrierHandler PROTO
-.SAFESEH ExceptionBarrierHandler
-ENDIF
-
-.586
-.MODEL FLAT, STDCALL
-ASSUME FS:NOTHING
-.CODE
-
-; extern "C" void WINAPI RegisterExceptionRecord(
-;                          EXCEPTION_REGISTRATION *registration,
-;                          ExceptionHandlerFunc func);
-RegisterExceptionRecord PROC registration:DWORD, func:DWORD
-OPTION PROLOGUE:None
-OPTION EPILOGUE:None
-  mov   edx, DWORD PTR [esp + 4]  ; edx is registration
-  mov   eax, DWORD PTR [esp + 8] ; eax is func
-  mov   DWORD PTR [edx + 4], eax
-  mov   eax, FS:[0]
-  mov   DWORD PTR [edx], eax
-  mov   FS:[0], edx
-  ret   8
-
-RegisterExceptionRecord ENDP
-
-; extern "C" void UnregisterExceptionRecord(
-;                           EXCEPTION_REGISTRATION *registration);
-UnregisterExceptionRecord PROC registration:DWORD
-OPTION PROLOGUE:None
-OPTION EPILOGUE:None
-
-  mov   edx, DWORD PTR [esp + 4]
-  mov   eax, [edx]
-  mov   FS:[0], eax
-  ret   4
-
-UnregisterExceptionRecord ENDP
-
-END