Deleted OS_WIN and all Windows specific files from base.

base/debug/debugger_win.cc

Index: base/debug/debugger_win.cc
diff --git a/base/debug/debugger_win.cc b/base/debug/debugger_win.cc
deleted file mode 100644
index a1d86e4453d98e6a102c64404497707947d73acd..0000000000000000000000000000000000000000
--- a/base/debug/debugger_win.cc
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (c) 2010 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/debug/debugger.h"
-
-#include <stdlib.h>
-#include <windows.h>
-
-namespace base {
-namespace debug {
-
-bool BeingDebugged() {
-  return ::IsDebuggerPresent() != 0;
-}
-
-void BreakDebugger() {
-  if (IsDebugUISuppressed())
-    _exit(1);
-
-  __debugbreak();
-}
-
-}  // namespace debug
-}  // namespace base