Deprecate more old filepath functions.

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 <winioctl.h>
 #include <shellapi.h>
@@ skipping 307 matching lines @@
 #elif defined(OS_POSIX)
   {L"/foo/bar", L"bar"},
   {L"/foo/bar/", L""},
   {L"/filename.exe", L"filename.exe"},
   {L"filename.exe", L"filename.exe"},
   {L"", L""},
   {L"/", L""},
 #endif
 };
 
+#if defined(OS_WIN)
+// This function is deprecated on non-Windows.
 TEST_F(FileUtilTest, GetFilenameFromPath) {
   for (unsigned int i = 0; i < arraysize(filename_cases); ++i) {
     const filename_case& value = filename_cases[i];
     std::wstring result = file_util::GetFilenameFromPath(value.path);
     EXPECT_EQ(value.filename, result);
   }
 }
+#endif
 
 // Test finding the file type from a path name
 static const struct extension_case {
   const wchar_t* path;
   const wchar_t* extension;
 } extension_cases[] = {
 #if defined(OS_WIN)
   {L"C:\\colon\\backslash\\filename.extension", L"extension"},
   {L"C:\\colon\\backslash\\filename.", L""},
   {L"C:\\colon\\backslash\\filename", L""},
@@ skipping 1503 matching lines @@
   EXPECT_TRUE(file_util::IsDirectoryEmpty(empty_dir));
 
   FilePath foo(empty_dir.Append(FILE_PATH_LITERAL("foo.txt")));
   std::string bar("baz");
   ASSERT_TRUE(file_util::WriteFile(foo, bar.c_str(), bar.length()));
 
   EXPECT_FALSE(file_util::IsDirectoryEmpty(empty_dir));
 }
 
 }  // namespace