Internals.selectColorInColorChooser(): type check element argument.

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.
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     [RaisesException] void pauseAnimations(double pauseTime);
 
     [RaisesException] Node nextSiblingByWalker(Node node);
     [RaisesException] Node firstChildByWalker(Node node);
     [RaisesException] Node lastChildByWalker(Node node);
     [RaisesException] Node nextNodeByWalker(Node node);
     [RaisesException] Node previousNodeByWalker(Node node);
 
     DOMString visiblePlaceholder(Element element);
 
-    void selectColorInColorChooser(Element element, DOMString colorValue);
+    [TypeChecking=Interface] void selectColorInColorChooser(Element element, DOMString colorValue);
 
     // If the argument is omitted, the top-level document is used.
     boolean hasAutofocusRequest(optional Document document);
     [RaisesException] DOMString[] formControlStateOfHistoryItem();
     [RaisesException] void setFormControlStateOfHistoryItem(sequence<DOMString> values);
     [RaisesException] void setEnableMockPagePopup(boolean enabled);
     readonly attribute PagePopupController pagePopupController;
 
     [RaisesException] ClientRect unscaledViewportRect();
 
@@ skipping 182 matching lines @@
     // These functions are for testing NetInfo. You must call setNetworkStateNotifierTestOnly(true)
     // before calling setNetworkConnectionInfo.
     void setNetworkStateNotifierTestOnly(boolean testOnly);
     [RaisesException] void setNetworkConnectionInfo(DOMString type);
 
     // This function is for testing HitRegions on Canvas2D.
     unsigned long countHitRegions(CanvasRenderingContext2D context);
 
     DOMString serializeNavigationMarkup(Document document);
 };