Split Dictionary's get and convert into DictionaryHelper.

Source/modules/encoding/TextEncoder.cpp

Index: Source/modules/encoding/TextEncoder.cpp
diff --git a/Source/modules/encoding/TextEncoder.cpp b/Source/modules/encoding/TextEncoder.cpp
index 723f7666db87e7b17b1eb913ddfef419c3741495..d44de6c58c1c840678a3ab394b0ffea89fec7ce6 100644
--- a/Source/modules/encoding/TextEncoder.cpp
+++ b/Source/modules/encoding/TextEncoder.cpp
@@ -33,6 +33,7 @@
 #include "modules/encoding/TextEncoder.h"
 
 #include "bindings/core/v8/Dictionary.h"
+#include "bindings/core/v8/DictionaryHelper.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/TextEncodingRegistry.h"
@@ -76,7 +77,7 @@ String TextEncoder::encoding() const
 PassRefPtr<Uint8Array> TextEncoder::encode(const String& input, const Dictionary& options)
 {
     bool stream = false;
-    options.get("stream", stream);
+    DictionaryHelper::get(options, "stream", stream);
 
     // FIXME: Not flushing is not supported by TextCodec for encode; add it or
     // handle split surrogates here.