Un-duplicate EvictFileFromSystemCache.

Change required for http://codereview.chromium.org/9639 .

Review URL: http://codereview.chromium.org/12407
Patch from Pawel Hajdan Jr.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@6006 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 28 insertions, 0 deletions

diff --git a/base/test_file_util_linux.cc b/base/test_file_util_linux.cc
new file mode 100644
index 0000000..421d182
--- /dev/null
+++ b/base/test_file_util_linux.cc
@@ -0,0 +1,28 @@
+// Copyright (c) 2008 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/test_file_util.h"
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "base/file_path.h"
+
+namespace file_util {
+
+bool EvictFileFromSystemCache(const wchar_t* file) {
+  FilePath fpath = FilePath::FromWStringHack(file);
+  int fd = open(fpath.value().c_str(), O_RDONLY);
+  if (fd < 0)
+    return false;
+  if (fdatasync(fd) != 0)
+    return false;
+  if (posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED) != 0)
+    return false;
+  close(fd);
+  return true;
+}
+
+}  // namespace file_util