Add an exception wrapper to the WindowProc functions so...

base/win/wrapped_window_proc.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/win/wrapped_window_proc.h"
+
+#include "base/atomicops.h"
+
+namespace {
+
+base::win::WinProcExceptionFilter s_exception_filter = NULL;
+
+}  // namespace.
+
+namespace base {
+namespace win {
+
+WinProcExceptionFilter SetWinProcExceptionFilter(
+    WinProcExceptionFilter filter) {
+  subtle::AtomicWord rv = subtle::NoBarrier_AtomicExchange(
+      reinterpret_cast<subtle::AtomicWord*>(&s_exception_filter),
+      reinterpret_cast<subtle::AtomicWord>(filter));
+  return reinterpret_cast<WinProcExceptionFilter>(rv);
+}
+
+int CallExceptionFilter(EXCEPTION_POINTERS* info) {
+  return s_exception_filter ? s_exception_filter(info) :
+                              EXCEPTION_CONTINUE_SEARCH;
+}
+
+}  // namespace win
+}  // namespace base