Don't update height in LayoutBlock::markFixedPositionObjectForLayoutIfNeeded.

third_party/WebKit/Source/core/layout/LayoutBox.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple 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 868 matching lines @@
 
   LayoutUnit containingBlockLogicalWidthForContent() const override;
   LayoutUnit containingBlockLogicalHeightForContent(
       AvailableLogicalHeightType) const;
 
   LayoutUnit containingBlockAvailableLineWidth() const;
   LayoutUnit perpendicularContainingBlockLogicalHeight() const;
 
   virtual void updateLogicalWidth();
   void updateLogicalHeight();
+  void computeLogicalHeight(LogicalExtentComputedValues&) const;
   virtual void computeLogicalHeight(LayoutUnit logicalHeight,
                                     LayoutUnit logicalTop,
                                     LogicalExtentComputedValues&) const;
   // This function will compute the logical border-box height, without laying
   // out the box. This means that the result is only "correct" when the height
   // is explicitly specified. This function exists so that intrinsic width
   // calculations have a way to deal with children that have orthogonal flows.
   // When there is no explicit height, this function assumes a content height of
   // zero (and returns just border+padding).
   LayoutUnit computeLogicalHeightWithoutLayout() const;
@@ skipping 714 matching lines @@
 
 inline bool LayoutBox::isForcedFragmentainerBreakValue(EBreak breakValue) {
   return breakValue == BreakColumn || breakValue == BreakLeft ||
          breakValue == BreakPage || breakValue == BreakRecto ||
          breakValue == BreakRight || breakValue == BreakVerso;
 }
 
 }  // namespace blink
 
 #endif  // LayoutBox_h