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

base/exception_barrier.cc

-// 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.
-// ========================================================================
-//
-// A class to make it easy to tag exception propagation boundaries and
-// get crash reports of exceptions that pass over same.
-#include "omaha/base/exception_barrier.h"
-
-enum {
-  // Flag set by exception handling machinery when unwinding
-  EH_UNWINDING = 0x00000002
-};
-
-// TODO(omaha): How to make this statically parameterizable?
-ExceptionBarrier::ExceptionHandler ExceptionBarrier::s_handler_ = NULL;
-
-// This function must be extern "C" to match up with the SAFESEH
-// declaration in our corresponding ASM file
-extern "C" EXCEPTION_DISPOSITION __cdecl
-ExceptionBarrierHandler(struct _EXCEPTION_RECORD *exception_record,
-                        void * establisher_frame,
-                        struct _CONTEXT *context,
-                        void * reserved) {
-  establisher_frame;  // unreferenced formal parameter
-  reserved;
-  if (!(exception_record->ExceptionFlags & EH_UNWINDING)) {
-    // When the exception is really propagating through us, we'd like to be
-    // called before the state of the program has been modified by the stack
-    // unwinding. In the absence of an exception handler, the unhandled
-    // exception filter gets called between the first chance and the second
-    // chance exceptions, so Windows pops either the JIT debugger or WER UI.
-    // This is not desirable in most of the cases.
-    ExceptionBarrier::ExceptionHandler handler = ExceptionBarrier::handler();
-    if (handler) {
-      EXCEPTION_POINTERS ptrs = { exception_record, context };
-
-      handler(&ptrs);
-    }
-  }
-
-  return ExceptionContinueSearch;
-}