Move eintr_wrapper.h from base to base/posix

base/eintr_wrapper.h

Index: base/eintr_wrapper.h
diff --git a/base/eintr_wrapper.h b/base/eintr_wrapper.h
deleted file mode 100644
index a1b7f7b7d1cf451b073f546d23eb429875b5c6ba..0000000000000000000000000000000000000000
--- a/base/eintr_wrapper.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright (c) 2012 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.
-
-// This provides a wrapper around system calls which may be interrupted by a
-// signal and return EINTR. See man 7 signal.
-//
-// On Windows, this wrapper macro does nothing.
-
-#ifndef BASE_EINTR_WRAPPER_H_
-#define BASE_EINTR_WRAPPER_H_
-
-#include "build/build_config.h"
-
-#if defined(OS_POSIX)
-
-#include <errno.h>
-
-#define HANDLE_EINTR(x) ({ \
-  typeof(x) __eintr_result__; \
-  do { \
-    __eintr_result__ = (x); \
-  } while (__eintr_result__ == -1 && errno == EINTR); \
-  __eintr_result__;\
-})
-
-#else
-
-#define HANDLE_EINTR(x) (x)
-
-#endif  // OS_POSIX
-
-#endif  // BASE_EINTR_WRAPPER_H_