Use BlobCallback in toBlob instead of FileCallback

third_party/WebKit/Source/core/fileapi/Blob.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 47 matching lines @@
         return new Blob(BlobDataHandle::create());
     }
 
     static Blob* create(const HeapVector<ArrayBufferOrArrayBufferViewOrBlobOrString>&, const BlobPropertyBag&, ExceptionState&);
 
     static Blob* create(PassRefPtr<BlobDataHandle> blobDataHandle)
     {
         return new Blob(blobDataHandle);
     }
 
+    static Blob* create(const unsigned char* data, size_t bytes, const String& mimeType);

[philipj_slow, 2016/01/19 22:28:14]

s/mimeType/contentType/ to match other bits of Blob.h/cpp

+
     ~Blob() override;
 
     virtual unsigned long long size() const { return m_blobDataHandle->size(); }
     virtual Blob* slice(long long start, long long end, const String& contentType, ExceptionState&) const;
 
     // To allow ExceptionState to be passed in last, manually enumerate the optional argument overloads.
     Blob* slice(ExceptionState& exceptionState) const
     {
         return slice(0, std::numeric_limits<long long>::max(), String(), exceptionState);
     }
@@ skipping 56 matching lines @@
 private:
     Blob();
 
     RefPtr<BlobDataHandle> m_blobDataHandle;
     bool m_hasBeenClosed;
 };
 
 } // namespace blink
 
 #endif // Blob_h