Handle crash when submitting an injected form on an "image page".

Source/core/platform/network/FormDataBuilder.h

 /*
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 15 matching lines @@
 
 namespace WTF{
 class TextEncoding;
 }
 
 namespace WebCore {
 
 class FormDataBuilder {
     WTF_MAKE_NONCOPYABLE(FormDataBuilder);
 public:
-    static WTF::TextEncoding encodingFromAcceptCharset(const String& acceptCharset, const String& inputEncoding);
+    static WTF::TextEncoding encodingFromAcceptCharset(const String& acceptCharset, const String& inputEncoding, const String& defaultCharset);
 
     // Helper functions used by HTMLFormElement for multi-part form data
     static Vector<char> generateUniqueBoundaryString();
     static void beginMultiPartHeader(Vector<char>&, const CString& boundary, const CString& name);
     static void addBoundaryToMultiPartHeader(Vector<char>&, const CString& boundary, bool isLastBoundary = false);
     static void addFilenameToMultiPartHeader(Vector<char>&, const WTF::TextEncoding&, const String& filename);
     static void addContentTypeToMultiPartHeader(Vector<char>&, const CString& mimeType);
     static void finishMultiPartHeader(Vector<char>&);
 
     // Helper functions used by HTMLFormElement for non multi-part form data
     static void addKeyValuePairAsFormData(Vector<char>&, const CString& key, const CString& value, FormData::EncodingType = FormData::FormURLEncoded);
     static void encodeStringAsFormData(Vector<char>&, const CString&);
 
 private:
     FormDataBuilder() {}
 };
 
 }
 
 #endif