Avoid markDirty when removing out-of-flow line boxes.

Source/core/rendering/RenderBox.cpp

Index: Source/core/rendering/RenderBox.cpp
diff --git a/Source/core/rendering/RenderBox.cpp b/Source/core/rendering/RenderBox.cpp
index bac05864c92591a5c7b058a932e902e9867982ba..acc271c4fcd549446803dce8dcef3a8cb28d5371 100644
--- a/Source/core/rendering/RenderBox.cpp
+++ b/Source/core/rendering/RenderBox.cpp
@@ -1940,7 +1940,7 @@ void RenderBox::positionLineBox(InlineBox* box)
         }
 
         // Nuke the box.
-        box->remove();
+        box->remove(DontMarkLineBoxes);
         box->destroy();
     } else if (isReplaced()) {
         setLocation(roundedLayoutPoint(box->topLeft()));