Blob/File constructors/slice method shouldn't throw on invalid types

Source/core/fileapi/File.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 73 matching lines @@
     OwnPtr<BlobData> blobData = BlobData::create();
     blobData->setContentType(getContentTypeFromFileName(fileSystemURL.path(), File::WellKnownContentTypes));
     blobData->appendFileSystemURL(fileSystemURL, 0, metadata.length, metadata.modificationTime / msPerSecond);
     return blobData.release();
 }
 
 // static
 File* File::create(const HeapVector<BlobOrStringOrArrayBufferViewOrArrayBuffer>& fileBits, const String& fileName, const FilePropertyBag& options, ExceptionState& exceptionState)
 {
     ASSERT(options.hasType());
-    if (!options.type().containsOnlyASCII()) {
-        exceptionState.throwDOMException(SyntaxError, "The 'type' property must consist of ASCII characters.");
-        return nullptr;
-    }
 
     double lastModified;
     if (options.hasLastModified())
         lastModified = static_cast<double>(options.lastModified());
     else
         lastModified = currentTimeMS();
 
     ASSERT(options.hasEndings());
     bool normalizeLineEndingsToNative = options.endings() == "native";
 
@@ skipping 247 matching lines @@
     if (m_fileSystemURL.isEmpty() != other.m_fileSystemURL.isEmpty())
         return false;
 
     if (!m_fileSystemURL.isEmpty())
         return m_fileSystemURL == other.m_fileSystemURL;
 
     return uuid() == other.uuid();
 }
 
 } // namespace blink