Add a use counter and deprecation message for showModalDialog

Source/core/page/UseCounter.cpp

 
 /*
  * Copyright (C) 2012 Google, 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 663 matching lines @@
 
     case EventReturnValue:
         return "event.returnValue is deprecated. Please use the standard event.preventDefault() instead.";
 
     case ScrollTopBodyNotQuirksMode:
         return "body.scrollTop is deprecated in strict mode. Please use 'documentElement.scrollTop' if in strict mode and 'body.scrollTop' only if in quirks mode.";
 
     case ScrollLeftBodyNotQuirksMode:
         return "body.scrollLeft is deprecated in strict mode. Please use 'documentElement.scrollLeft' if in strict mode and 'body.scrollLeft' only if in quirks mode.";
 
+    case ShowModalDialog:
+        return "Chromium is considering deprecating showModalDialog. Please use window.open and postMessage instead.";
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();
     }
 }
 
 void UseCounter::count(CSSParserContext context, CSSPropertyID feature)
 {
     ASSERT(feature >= firstCSSProperty);
     ASSERT(feature <= lastCSSProperty);
@@ skipping 28 matching lines @@
 UseCounter* UseCounter::getFrom(const StyleSheetContents* sheetContents)
 {
     // FIXME: We may want to handle stylesheets that have multiple owners
     //        http://crbug.com/242125
     if (sheetContents && !sheetContents->isUserStyleSheet() && sheetContents->hasSingleOwnerNode())
         return getFrom(sheetContents->singleOwnerDocument());
     return 0;
 }
 
 } // namespace WebCore