Force re-layout of a float when we just became unfragmented.

third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp

 /*
  * Copyright (C) 2013 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 3678 matching lines @@
   logicalTopMarginEdge = floatLogicalLocation.y();
 
   setLogicalLeftForFloat(floatingObject, floatLogicalLocation.x());
 
   setLogicalLeftForChild(child,
                          floatLogicalLocation.x() + childLogicalLeftMargin);
   setLogicalTopForChild(child,
                         logicalTopMarginEdge + marginBeforeForChild(child));
 
   SubtreeLayoutScope layoutScope(child);
-  if (isPaginated && !child.needsLayout())
+  if (!child.needsLayout())
     markChildForPaginationRelayoutIfNeeded(child, layoutScope);
 
   child.layoutIfNeeded();
 
   if (isPaginated) {
     LayoutUnit newLogicalTopMarginEdge =
         adjustFloatLogicalTopForPagination(child, logicalTopMarginEdge);
     if (logicalTopMarginEdge != newLogicalTopMarginEdge) {
       floatLogicalLocation = computeLogicalLocationForFloat(
           floatingObject, newLogicalTopMarginEdge);
@@ skipping 841 matching lines @@
   return LayoutBlock::invalidatePaintIfNeeded(paintInvalidationState);
 }
 
 void LayoutBlockFlow::invalidateDisplayItemClients(
     PaintInvalidationReason invalidationReason) const {
   BlockFlowPaintInvalidator(*this).invalidateDisplayItemClients(
       invalidationReason);
 }
 
 }  // namespace blink