Encoding API: Add ignoreBOM flag to decoder options

Source/modules/encoding/TextDecoder.h

Index: Source/modules/encoding/TextDecoder.h
diff --git a/Source/modules/encoding/TextDecoder.h b/Source/modules/encoding/TextDecoder.h
index e630ed5540cdbc641e782c2b40bd243bb005b6eb..225db09de494a734a498cdd2dd39e302eb0cee5e 100644
--- a/Source/modules/encoding/TextDecoder.h
+++ b/Source/modules/encoding/TextDecoder.h
@@ -56,11 +56,12 @@ public:
     void trace(Visitor*) { }
 
 private:
-    TextDecoder(const String& encoding, bool fatal);
+    TextDecoder(const String& encoding, bool fatal, bool ignoreBOM);
 
     WTF::TextEncoding m_encoding;
     OwnPtr<WTF::TextCodec> m_codec;
     bool m_fatal;
+    bool m_ignoreBOM;
     bool m_bomSeen;
 };