split file path constants out for split link

base/files/file_path_constants.cc

+// Copyright 2013 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/files/file_path.h"
+
+namespace base {
+
+#if defined(FILE_PATH_USES_WIN_SEPARATORS)
+const FilePath::CharType FilePath::kSeparators[] = FILE_PATH_LITERAL("\\/");
+#else  // FILE_PATH_USES_WIN_SEPARATORS
+const FilePath::CharType FilePath::kSeparators[] = FILE_PATH_LITERAL("/");
+#endif  // FILE_PATH_USES_WIN_SEPARATORS
+
+const size_t FilePath::kSeparatorsLength = arraysize(kSeparators);
+
+const FilePath::CharType FilePath::kCurrentDirectory[] = FILE_PATH_LITERAL(".");
+const FilePath::CharType FilePath::kParentDirectory[] = FILE_PATH_LITERAL("..");
+
+const FilePath::CharType FilePath::kExtensionSeparator = FILE_PATH_LITERAL('.');
+
+}  // namespace base