Disable "using base::FilePath" on Linux since it now compiles.

base/i18n/file_util_icu_unittest.cc

 // Copyright (c) 2012 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/i18n/file_util_icu.h"
 
 #include "base/file_util.h"
 #include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
@@ skipping 78 matching lines @@
 } kNormalizeFileNameEncodingTestCases[] = {
   { "foo_na\xcc\x88me.foo", "foo_n\xc3\xa4me.foo"},
   { "foo_dir_na\xcc\x88me/foo_na\xcc\x88me.foo",
     "foo_dir_na\xcc\x88me/foo_n\xc3\xa4me.foo"},
   { "", ""},
   { "foo_dir_na\xcc\x88me/", "foo_dir_n\xc3\xa4me"}
 };
 
 TEST_F(FileUtilICUTest, NormalizeFileNameEncoding) {
   for (size_t i = 0; i < arraysize(kNormalizeFileNameEncodingTestCases); i++) {
-    FilePath path(kNormalizeFileNameEncodingTestCases[i].original_path);
+    base::FilePath path(kNormalizeFileNameEncodingTestCases[i].original_path);
     file_util::NormalizeFileNameEncoding(&path);
-    EXPECT_EQ(FilePath(kNormalizeFileNameEncodingTestCases[i].normalized_path),
-              path);
+    EXPECT_EQ(
+        base::FilePath(kNormalizeFileNameEncodingTestCases[i].normalized_path),
+        path);
   }
 }
 
 #endif