text-overflow on flexbox should have no effect

Source/core/rendering/RenderBlockLineLayout.cpp

Index: Source/core/rendering/RenderBlockLineLayout.cpp
diff --git a/Source/core/rendering/RenderBlockLineLayout.cpp b/Source/core/rendering/RenderBlockLineLayout.cpp
index ce81bc9dde2ab711acd439ac3558ad18748bf8af..3d8372e2727af7a891b4a8ba80f075ad1e0afc0a 100644
--- a/Source/core/rendering/RenderBlockLineLayout.cpp
+++ b/Source/core/rendering/RenderBlockLineLayout.cpp
@@ -2143,12 +2143,15 @@ void RenderBlockFlow::layoutInlineChildren(bool relayoutChildren, LayoutUnit& re
 
     // 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)