Track the region where text is painted.

Source/core/platform/chromium/PopupListBox.cpp

 /*
  * Copyright (c) 2011, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 454 matching lines @@
 
     // Prepare the directionality to draw text.
     TextRun textRun(itemText, 0, 0, TextRun::AllowTrailingExpansion, style.textDirection(), style.hasTextDirectionOverride());
     // If the text is right-to-left, make it right-aligned by adjusting its
     // beginning position.
     if (rightAligned)
         textX += maxWidth - itemFont.width(textRun);
 
     // Draw the item text.
     int textY = rowRect.y() + itemFont.fontMetrics().ascent() + (rowRect.height() - itemFont.fontMetrics().height()) / 2;
-    gc->drawBidiText(itemFont, textRun, IntPoint(textX, textY));
+    gc->drawBidiText(itemFont, textRun, IntPoint(textX, textY), rowRect);
 
     // We are using the left padding as the right padding includes room for the scroll-bar which
     // does not show in this case.
     int rightPadding = max<int>(0, m_popupClient->clientPaddingLeft() - m_popupClient->clientInsetLeft());
     int remainingWidth = rowRect.width() - rightPadding;
 
     // Draw the icon if applicable.
     RefPtr<Image> image(Image::loadPlatformResource(itemIcon.utf8().data()));
     if (image && !image->isNull()) {
         IntRect imageRect = image->rect();
@@ skipping 16 matching lines @@
         itemFont.update(0);
     }
 
     TextRun labelTextRun(itemLabel, 0, 0, TextRun::AllowTrailingExpansion, style.textDirection(), style.hasTextDirectionOverride());
     if (rightAligned)
         textX = max<int>(0, m_popupClient->clientPaddingLeft() - m_popupClient->clientInsetLeft());
     else
         textX = remainingWidth - itemFont.width(labelTextRun);
 
     gc->setFillColor(labelColor, ColorSpaceDeviceRGB);
-    gc->drawBidiText(itemFont, labelTextRun, IntPoint(textX, textY));
+    gc->drawBidiText(itemFont, labelTextRun, IntPoint(textX, textY), rowRect);
 }
 
 Font PopupListBox::getRowFont(int rowIndex)
 {
     Font itemFont = m_popupClient->itemStyle(rowIndex).font();
     if (m_popupClient->itemIsLabel(rowIndex)) {
         // Bold-ify labels (ie, an <optgroup> heading).
         FontDescription d = itemFont.fontDescription();
         d.setWeight(FontWeightBold);
         Font font(d, itemFont.letterSpacing(), itemFont.wordSpacing());
@@ skipping 386 matching lines @@
 {
     return numItems() && IntRect(0, 0, width(), height()).contains(point);
 }
 
 int PopupListBox::popupContentHeight() const
 {
     return height();
 }
 
 } // namespace WebCore