Fold FormDataList::getEntry(index) into DOMFormData.

Source/core/html/DOMFormData.h

Index: Source/core/html/DOMFormData.h
diff --git a/Source/core/html/DOMFormData.h b/Source/core/html/DOMFormData.h
index 3e73cdd2ee7efa34b5a734ba5b9cb72ec4e7ecf2..c2c14b913703a3c7273c246ced20e929d5381dbe 100644
--- a/Source/core/html/DOMFormData.h
+++ b/Source/core/html/DOMFormData.h
@@ -78,6 +78,8 @@ public:
     void makeOpaque() { m_opaque = true; }
     bool opaque() const { return m_opaque; }
 
+    String decode(const CString& data) const;
+
 private:
     explicit DOMFormData(const WTF::TextEncoding&);
     explicit DOMFormData(HTMLFormElement*);