Upstream android file related code.

base/platform_file_android.h

Index: base/platform_file_android.h
diff --git a/base/platform_file_android.h b/base/platform_file_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..6b018d86cdec41fe4d7e7e325b6e9a79dc09190a
--- /dev/null
+++ b/base/platform_file_android.h
@@ -0,0 +1,15 @@
+// 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.
+
+#ifndef BASE_PLATFORM_FILE_ANDROID_H_
+#define BASE_PLATFORM_FILE_ANDROID_H_

[joth, 2011/06/19 12:48:05]

(Looking for a base OWNER opinion on this; I'm guessing)

I'm not sure about the file name for this cc/h pair.
platform_file.h already exists and has a different purpose: it's a
cross-platform wrapper that defines PlatformFile typedef and various methods
that operate on it.

In here we are declaring posix/linux methods that are missing from sys/time.h
and stdlib.h

Investigating a bit more, based on compat_execinfo.h I think the consistent
style would be to split this into a pair of files called 
base/compat_sys_time.h and base/compat_stdlib.h  and use these in place of their
name-sakes?

[brettw, 2011/06/20 03:50:40]

How about file_util_android.h/cc? I'd rather not have two separate headers, each
with just one function. file_util is kind of "misc stuff" and I think it's fine
if these go in there if you agree.

+#pragma once
+
+// Not implemented in Bionic. See platform_file_android.cc.
+extern "C" int futimes(int fd, const struct timeval tv[2]);
+
+// The prototype of mkdtemp is missing.
+extern "C" char* mkdtemp(char* path);
+
+#endif  // BASE_PLATFORM_FILE_ANDROID_H_