Deprecate file_util::AppendToPath() on non-Windows.

base/file_util.cc

 // Copyright (c) 2006-2009 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/file_util.h"
 
 #if defined(OS_WIN)
 #include <io.h>
 #endif
 #include <stdio.h>
@@ skipping 313 matching lines @@
   return ReadFileToString(FilePath::FromWStringHack(path), contents);
 }
 
 bool AbsolutePath(std::wstring* path_str) {
   FilePath path(FilePath::FromWStringHack(*path_str));
   if (!AbsolutePath(&path))
     return false;
   *path_str = path.ToWStringHack();
   return true;
 }
+
+#if defined(OS_WIN)
+// This function is deprecated; see file_util_deprecated.h for details.
 void AppendToPath(std::wstring* path, const std::wstring& new_ending) {
   if (!path) {
     NOTREACHED();
     return;  // Don't crash in this function in release builds.
   }
 
-  if (!EndsWithSeparator(path))
+  if (!EndsWithSeparator(*path))
     path->push_back(FilePath::kSeparators[0]);
   path->append(new_ending);
 }
+#endif
+
 bool CopyDirectory(const std::wstring& from_path, const std::wstring& to_path,
                    bool recursive) {
   return CopyDirectory(FilePath::FromWStringHack(from_path),
                        FilePath::FromWStringHack(to_path),
                        recursive);
 }
 bool Delete(const std::wstring& path, bool recursive) {
   return Delete(FilePath::FromWStringHack(path), recursive);
 }
-bool EndsWithSeparator(std::wstring* path) {
-  return EndsWithSeparator(FilePath::FromWStringHack(*path));
-}
 bool EndsWithSeparator(const std::wstring& path) {
   return EndsWithSeparator(FilePath::FromWStringHack(path));
 }
 bool GetCurrentDirectory(std::wstring* path_str) {
   FilePath path;
   if (!GetCurrentDirectory(&path))
     return false;
   *path_str = path.ToWStringHack();
   return true;
 }
@@ skipping 57 matching lines @@
 // FileEnumerator
 //
 // Note: the main logic is in file_util_<platform>.cc
 
 bool FileEnumerator::ShouldSkip(const FilePath& path) {
   FilePath::StringType basename = path.BaseName().value();
   return IsDot(path) || (IsDotDot(path) && !(INCLUDE_DOT_DOT & file_type_));
 }
 
 }  // namespace