Oilpan: Remove most WillBe types from the code base

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

 /*
  * 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 34 matching lines @@
 class FileWriterSync final
 #if ENABLE(OILPAN)
     : public GarbageCollectedFinalized<FileWriterSync>
     , public FileWriterBase
 #else
     : public FileWriterBase
 #endif
     , public ScriptWrappable
     , public WebFileWriterClient {
     DEFINE_WRAPPERTYPEINFO();
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FileWriterSync);
+    USING_GARBAGE_COLLECTED_MIXIN(FileWriterSync);
 public:
     static FileWriterSync* create()
     {
         return new FileWriterSync();
     }
     ~FileWriterSync() override;
     DECLARE_VIRTUAL_TRACE();
 
     // FileWriterBase
     void write(Blob*, ExceptionState&);
@@ skipping 11 matching lines @@
 
     FileError::ErrorCode m_error;
 #if ENABLE(ASSERT)
     bool m_complete;
 #endif
 };
 
 } // namespace blink
 
 #endif // FileWriterSync_h