Internals.setValueForUser(): add argument type check.

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 275 matching lines @@
     [CallWith=ScriptState] Promise createResolvedPromise(any value);
     [CallWith=ScriptState] Promise createRejectedPromise(any reason);
     [CallWith=ScriptState] Promise addOneToPromise(Promise promise);
     [CallWith=ScriptState, RaisesException] Promise promiseCheck(long arg1, boolean arg2, Dictionary arg3, DOMString arg4, sequence<DOMString> arg5);
     [CallWith=ScriptState] Promise promiseCheckWithoutExceptionState(Dictionary arg1, DOMString arg2, DOMString... variadic);
     [CallWith=ScriptState] Promise promiseCheckRange([EnforceRange] octet arg1);
     [CallWith=ScriptState] Promise promiseCheckOverload(Location arg1);
     [CallWith=ScriptState] Promise promiseCheckOverload(Document arg1);
     [CallWith=ScriptState] Promise promiseCheckOverload(Location arg1, long arg2, long arg3);
 
-    void setValueForUser(Element element, DOMString value);
+    void setValueForUser(HTMLInputElement element, DOMString value);
 
     DOMString textSurroundingNode(Node node, long x, long y, unsigned long maxLength);
 
     void setFocused(boolean focused);
     void setInitialFocus(boolean reverse);
 
     boolean ignoreLayoutWithPendingStylesheets(Document document);
 
     // These functions are for testing NetInfo. You must call clearNetworkConnectionInfoOverride() at the end.
     [RaisesException] void setNetworkConnectionInfoOverride(boolean onLine, DOMString type, double downlinkMaxMbps);
@@ skipping 48 matching lines @@
     DOMString getScrollAnimationState(Node node);
 
     DOMString getProgrammaticScrollAnimationState(Node node);
 
     ClientRect visualRect(Node node);
 
     OriginTrialsTest originTrialsTest();
 
     void crash();
 };