bindings: Make the sequence conversion code more complaint with WebIDL.

third_party/WebKit/Source/core/testing/Internals.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 306 matching lines @@
     void clearNetworkConnectionInfoOverride();
 
     // This function is for testing HitRegions on Canvas2D.
     unsigned long countHitRegions(CanvasRenderingContext2D context);
 
     boolean isInCanvasFontCache(Document document, DOMString fontString);
     unsigned long canvasFontCacheMaxFonts();
 
     DictionaryTest dictionaryTest();
     RecordTest recordTest();
+    SequenceTest sequenceTest();
     UnionTypesTest unionTypesTest();
     CallbackFunctionTest callbackFunctionTest();
     [RaisesException] void setScrollChain(ScrollState scrollState, sequence<Element> elements);
     void forceBlinkGCWithoutV8GC();
 
     DOMString selectedHTMLForClipboard();
     DOMString selectedTextForClipboard();
 
     void setVisualViewportOffset(long x, long y);
     int visualViewportHeight();
@@ skipping 34 matching lines @@
     DOMString getProgrammaticScrollAnimationState(Node node);
 
     ClientRect visualRect(Node node);
 
     OriginTrialsTest originTrialsTest();
 
     void crash();
 
     void setIsLowEndDevice(boolean isLowEndDevice);
 };