Upstream android file related code.

base/os_compat_android.cc

Index: base/os_compat_android.cc
diff --git a/base/os_compat_android.cc b/base/os_compat_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5c4f2abe59242fa879e57fbd1113b8ac26161355
--- /dev/null
+++ b/base/os_compat_android.cc
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+// 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/os_compat_android.h"
+
+#include "base/string_util.h"
+
+// There is no futimes() avaiable in Bionic, so we provide our own
+// implementation until it is there.
+extern "C" {
+
+int futimes(int fd, const struct timeval tv[2]) {
+  const std::string fd_path = StringPrintf("/proc/self/fd/%d", fd);
+  return utimes(fd_path.c_str(), tv);
+}
+
+}  // extern "C"