text-overflow on flexbox should have no effect

Source/core/rendering/RenderBlockLineLayout.cpp

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 2125 matching lines @@
     // Figure out if we should clear out our line boxes.
     // FIXME: Handle resize eventually!
     bool isFullLayout = !firstLineBox() || selfNeedsLayout() || relayoutChildren || clearLinesForPagination;
     LineLayoutState layoutState(isFullLayout, repaintLogicalTop, repaintLogicalBottom, flowThread);
 
     if (isFullLayout)
         lineBoxes()->deleteLineBoxes();
 
     // Text truncation kicks in in two cases:
     //     1) If your overflow isn't visible and your text-overflow-mode isn't clip.
-    //     2) If you're an anonymous block with a block parent that satisfies #1.
+    //     2) If you're an anonymous block with a block parent that satisfies #1 that was created
+    //        to accomodate a block that has inline and block children. This excludes parents where
+    //        canCollapseAnonymousBlockChild is false, notabley flex items and grid items.
     // FIXME: CSS3 says that descendants that are clipped must also know how to truncate.  This is insanely
     // difficult to figure out in general (especially in the middle of doing layout), so we only handle the
     // simple case of an anonymous block truncating when it's parent is clipped.
     bool hasTextOverflow = (style()->textOverflow() && hasOverflowClip())
-        || (isAnonymousBlock() && parent() && parent()->isRenderBlock() && parent()->style()->textOverflow() && parent()->hasOverflowClip());
+        || (isAnonymousBlock() && parent() && parent()->isRenderBlock() && toRenderBlock(parent())->canCollapseAnonymousBlockChild()
+            && parent()->style()->textOverflow() && parent()->hasOverflowClip());
 
     // Walk all the lines and delete our ellipsis line boxes if they exist.
     if (hasTextOverflow)
          deleteEllipsisLineBoxes();
 
     if (firstChild()) {
         // In full layout mode, clear the line boxes of children upfront. Otherwise,
         // siblings can run into stale root lineboxes during layout. Then layout
         // the replaced elements later. In partial layout mode, line boxes are not
         // deleted and only dirtied. In that case, we can layout the replaced
@@ skipping 1397 matching lines @@
     lineGridBox->alignBoxesInBlockDirection(logicalHeight(), textBoxDataMap, verticalPositionCache);
 
     setLineGridBox(lineGridBox);
 
     // FIXME: If any of the characteristics of the box change compared to the old one, then we need to do a deep dirtying
     // (similar to what happens when the page height changes). Ideally, though, we only do this if someone is actually snapping
     // to this grid.
 }
 
 }