Correct elementMatches filter for datalist.options

third_party/WebKit/Source/core/paint/ThemePainter.cpp

 /**
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 309 matching lines @@
                             zoomFactor));
     tickRegionSideMargin =
         trackBounds.y() +
         (thumbSize.width() - tickSize.width() * zoomFactor) / 2.0;
     tickRegionWidth = trackBounds.height() - thumbSize.width();
   }
   HTMLDataListOptionsCollection* options = dataList->options();
   for (unsigned i = 0; HTMLOptionElement* optionElement = options->item(i);
        i++) {
     String value = optionElement->value();
+    if (optionElement->isDisabledFormControl() || value.isEmpty())
+      continue;
     if (!input->isValidValue(value))
       continue;
     double parsedValue =
         parseToDoubleForNumberType(input->sanitizeValue(value));
     double tickFraction = (parsedValue - min) / (max - min);
     double tickRatio = isHorizontal && o.styleRef().isLeftToRightDirection()
                            ? tickFraction
                            : 1.0 - tickFraction;
     double tickPosition =
         round(tickRegionSideMargin + tickRegionWidth * tickRatio);
@@ skipping 64 matching lines @@
     i.context.translate(-unzoomedRect.x(), -unzoomedRect.y());
   }
 
   Platform::current()->fallbackThemeEngine()->paint(
       canvas, WebFallbackThemeEngine::PartRadio, getWebFallbackThemeState(o),
       WebRect(unzoomedRect), &extraParams);
   return false;
 }
 
 }  // namespace blink