Remove FileError interface

third_party/WebKit/Source/modules/filesystem/DirectoryReaderSync.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 55 matching lines @@
     Member<DirectoryReaderSync> m_reader;
 };
 
 class DirectoryReaderSync::ErrorCallbackHelper final : public ErrorCallback {
 public:
     explicit ErrorCallbackHelper(DirectoryReaderSync* reader)
         : m_reader(reader)
     {
     }
 
+    void handleEvent(DOMException* error) override
+    {
+        NOTREACHED();
+    }
+
     void handleEvent(FileError* error) override
     {
         m_reader->setError(error->code());
     }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_reader);
         ErrorCallback::trace(visitor);
     }
@@ skipping 32 matching lines @@
     return result;
 }
 
 DEFINE_TRACE(DirectoryReaderSync)
 {
     visitor->trace(m_entries);
     DirectoryReaderBase::trace(visitor);
 }
 
 } // namespace blink