Move PathExists to base namespace.

base/mac/mac_util_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/mac_util.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 228 matching lines @@
   // attribute set.
   EXPECT_TRUE(RemoveQuarantineAttribute(dummy_folder_path));
   EXPECT_TRUE(RemoveQuarantineAttribute(dummy_folder_path));
   EXPECT_EQ(ENOATTR, errno);
 }
 
 TEST_F(MacUtilTest, TestRemoveQuarantineAttributeNonExistentPath) {
   ScopedTempDir temp_dir_;
   ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
   FilePath non_existent_path = temp_dir_.path().Append("DummyPath");
-  ASSERT_FALSE(file_util::PathExists(non_existent_path));
+  ASSERT_FALSE(PathExists(non_existent_path));
   EXPECT_FALSE(RemoveQuarantineAttribute(non_existent_path));
 }
 
 }  // namespace
 
 }  // namespace mac
 }  // namespace base