| Index: Source/core/frame/Window.idl
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| diff --git a/Source/core/frame/Window.idl b/Source/core/frame/Window.idl
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| index 7330f664b71b9ddcce0ba10252862b707d860151..c4f0bdc31871a9386f6172d5ac8e7599d2392f3e 100644
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| --- a/Source/core/frame/Window.idl
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| +++ b/Source/core/frame/Window.idl
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| @@ -69,9 +69,9 @@
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|  
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|      void alert();
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|      void alert(DOMString message);
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| -    boolean confirm([Default=NullString] optional DOMString message);
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| -    [TreatReturnedNullStringAs=Null] DOMString prompt([Default=NullString] optional DOMString message,
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| -                                                      [Default=NullString] optional DOMString defaultValue);
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| +    boolean confirm(optional DOMString message = null);
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| +    [TreatReturnedNullStringAs=Null] DOMString prompt(optional DOMString message = null,
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| +                                                      optional DOMString defaultValue = null);
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|  
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|      boolean find([Default=Undefined] optional DOMString string,
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|                   [Default=Undefined] optional boolean caseSensitive,
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| 
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