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

base/file_util_unittest.cc

 // Copyright (c) 2010 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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 127 matching lines @@
   {L"/foo/bar", L"path", L"/foo/bar/path"},
   {L"/foo/bar/", L"path", L"/foo/bar/path"},
   {L"/foo/bar//", L"path", L"/foo/bar//path"},
   {L"/foo/bar/", L"", L"/foo/bar/"},
   {L"/foo/bar", L"", L"/foo/bar/"},
   {L"", L"path", L"/path"},
   {L"", L"", L"/"},
 #endif
 };
 
+#if defined(OS_WIN)
+// This function is deprecated, but still used on Windows.
 TEST_F(FileUtilTest, AppendToPath) {
   for (unsigned int i = 0; i < arraysize(append_cases); ++i) {
     const append_case& value = append_cases[i];
     std::wstring result = value.path;
     file_util::AppendToPath(&result, value.ending);
     EXPECT_EQ(value.result, result);
   }
 
 #ifdef NDEBUG
   file_util::AppendToPath(NULL, L"path");  // asserts in debug mode
 #endif
 }
+#endif  // defined(OS_WIN)
+
 
 static const struct InsertBeforeExtensionCase {
   const FilePath::CharType* path;
   const FilePath::CharType* suffix;
   const FilePath::CharType* result;
 } kInsertBeforeExtension[] = {
   {FPL(""), FPL(""), FPL("")},
   {FPL(""), FPL("txt"), FPL("txt")},
   {FPL("."), FPL("txt"), FPL("txt.")},
   {FPL("."), FPL(""), FPL(".")},
@@ skipping 1240 matching lines @@
   // modification times with 2s resolution.
   ASSERT_TRUE(base::Time::FromString(L"Tue, 15 Nov 1994, 12:45:26 GMT",
               &modification_time));
   ASSERT_TRUE(file_util::SetLastModifiedTime(foobar, modification_time));
   file_util::FileInfo file_info;
   ASSERT_TRUE(file_util::GetFileInfo(foobar, &file_info));
   ASSERT_TRUE(file_info.last_modified == modification_time);
 }
 
 }  // namespace