Remove FileError interface

third_party/WebKit/Source/modules/filesystem/SyncCallbackHelper.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. 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.
@@ skipping 101 matching lines @@
         Member<HelperType> m_helper;
     };
 
     class ErrorCallbackImpl final : public ErrorCallback {
     public:
         static ErrorCallbackImpl* create(HelperType* helper)
         {
             return new ErrorCallbackImpl(helper);
         }
 
+        void handleEvent(DOMException* error) override
+        {
+            NOTREACHED();
+        }
+
         void handleEvent(FileError* error) override
         {
             ASSERT(error);
             m_helper->setError(error->code());
         }
 
         DEFINE_INLINE_TRACE()
         {
             visitor->trace(m_helper);
             ErrorCallback::trace(visitor);
@@ skipping 34 matching lines @@
 };
 
 typedef SyncCallbackHelper<EntryCallback, Entry*, EntrySync> EntrySyncCallbackHelper;
 typedef SyncCallbackHelper<MetadataCallback, Metadata*, Metadata> MetadataSyncCallbackHelper;
 typedef SyncCallbackHelper<VoidCallback, EmptyType*, EmptyType> VoidSyncCallbackHelper;
 typedef SyncCallbackHelper<FileSystemCallback, DOMFileSystem*, DOMFileSystemSync> FileSystemSyncCallbackHelper;
 
 } // namespace blink
 
 #endif // SyncCallbackHelper_h