InlinedVisitor: Migrate filesystem to use inlined tracing

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 68 matching lines @@
     {
         if (m_errorCode)
             FileError::throwDOMException(exceptionState, m_errorCode);
 
         return m_result;
     }
 
     SuccessCallback* successCallback() { return SuccessCallbackImpl::create(this); }
     ErrorCallback* errorCallback() { return ErrorCallbackImpl::create(this); }
 
-    void trace(Visitor* visitor)
+    DEFINE_INLINE_TRACE()
     {
         visitor->trace(m_result);
     }
 
 private:
     SyncCallbackHelper()
         : m_errorCode(FileError::OK)
         , m_completed(false)
     {
     }
@@ skipping 60 matching lines @@
     FileError::ErrorCode m_errorCode;
     bool m_completed;
 };
 
 struct EmptyType : public GarbageCollected<EmptyType> {
     static EmptyType* create(EmptyType*)
     {
         return 0;
     }
 
-    void trace(Visitor*) { }
+    DEFINE_INLINE_TRACE() { }
 };
 
 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