Eliminate [LegacyInterfaceTypeChecking] for modules/filesystem bindings

third_party/WebKit/Source/modules/filesystem/FileWriterSync.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 24 matching lines @@
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/fileapi/Blob.h"
 #include "public/platform/WebFileWriter.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
 
 void FileWriterSync::write(Blob* data, ExceptionState& exceptionState)
 {
+    ASSERT(data);
     ASSERT(writer());
     ASSERT(m_complete);
-    if (!data) {
-        exceptionState.throwDOMException(TypeMismatchError, FileError::typeMismatchErrorMessage);
-        return;
-    }
 
     prepareForWrite();
     writer()->write(position(), data->uuid());
     ASSERT(m_complete);
     if (m_error) {
         FileError::throwDOMException(exceptionState, m_error);
         return;
     }
     setPosition(position() + data->size());
     if (position() > length())
@@ skipping 77 matching lines @@
 FileWriterSync::~FileWriterSync()
 {
 }
 
 DEFINE_TRACE(FileWriterSync)
 {
     FileWriterBase::trace(visitor);
 }
 
 } // namespace blink