Do not normalize into NFC the values of form fields

Source/core/fileapi/BlobBuilder.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 42 matching lines @@
 {
     // If the last item is not a data item, create one. Otherwise, we simply append the new string to the last data item.
     if (m_items.isEmpty() || m_items[m_items.size() - 1].type != BlobDataItem::Data)
         m_items.append(BlobDataItem(RawData::create()));
 
     return *m_items[m_items.size() - 1].data->mutableData();
 }
 
 void BlobBuilder::append(const String& text, const String& endingType)
 {
-    CString utf8Text = UTF8Encoding().encode(text, WTF::EntitiesForUnencodables);
+    CString utf8Text = UTF8Encoding().normalizeAndEncode(text, WTF::EntitiesForUnencodables);
 
     Vector<char>& buffer = getBuffer();
     size_t oldSize = buffer.size();
 
     if (endingType == "native")
         normalizeLineEndingsToNative(utf8Text, buffer);
     else {
         ASSERT(endingType == "transparent");
         buffer.append(utf8Text.data(), utf8Text.length());
     }
@@ skipping 57 matching lines @@
     RefPtr<Blob> blob = Blob::create(blobData.release(), m_size);
 
     // After creating a blob from the current blob data, we do not need to keep the data around any more. Instead, we only
     // need to keep a reference to the URL of the blob just created.
     m_items.append(BlobDataItem(blob->url(), 0, m_size));
 
     return blob;
 }
 
 } // namespace WebCore