Fix inline-block baseline with overflow: <not visible>

Source/core/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * 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
@@ skipping 6489 matching lines @@
         // is turned off, checkboxes/radios will still have decent baselines.
         // FIXME: Need to patch form controls to deal with vertical lines.
         if (style()->hasAppearance() && !theme()->isControlContainer(style()->appearance()))
             return theme()->baselinePosition(this);
 
         // CSS2.1 states that the baseline of an inline block is the baseline of the last line box in
         // the normal flow.  We make an exception for marquees, since their baselines are meaningless
         // (the content inside them moves).  This matches WinIE as well, which just bottom-aligns them.
         // We also give up on finding a baseline if we have a vertical scrollbar, or if we are scrolled
         // vertically (e.g., an overflow:hidden block that has had scrollTop moved).
+        // inline-block with overflow should use the bottom of margin box as well.
         bool ignoreBaseline = (layer() && (isMarquee() || (direction == HorizontalLine ? (layer()->verticalScrollbar() || layer()->scrollYOffset())
-            : (layer()->horizontalScrollbar() || layer()->scrollXOffset() != 0)))) || (isWritingModeRoot() && !isRubyRun());
+            : (layer()->horizontalScrollbar() || layer()->scrollXOffset())))) || (isWritingModeRoot() && !isRubyRun())
+            || (style()->isDisplayInlineType() && style()->overflowY() != OVISIBLE);
 
         int baselinePos = ignoreBaseline ? -1 : inlineBlockBaseline(direction);
 
         if (isDeprecatedFlexibleBox()) {
             // Historically, we did this check for all baselines. But we can't
             // remove this code from deprecated flexbox, because it effectively
             // breaks -webkit-line-clamp, which is used in the wild -- we would
             // calculate the baseline as if -webkit-line-clamp wasn't used.
             // For simplicity, we use this for all uses of deprecated flexbox.
             LayoutUnit bottomOfContent = direction == HorizontalLine ? borderTop() + paddingTop() + contentHeight() : borderRight() + paddingRight() + contentWidth();
@@ skipping 1739 matching lines @@
 }
 
 String ValueToString<RenderBlock::FloatingObject*>::string(const RenderBlock::FloatingObject* floatingObject)
 {
     return String::format("%p (%dx%d %dx%d)", floatingObject, floatingObject->frameRect().pixelSnappedX(), floatingObject->frameRect().pixelSnappedY(), floatingObject->frameRect().pixelSnappedMaxX(), floatingObject->frameRect().pixelSnappedMaxY());
 }
 
 #endif
 
 } // namespace WebCore