[css-grid] Avoid negative values as override containing block sizes

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 1143 matching lines @@
 
 // TODO (lajava) Shouldn't we implement these functions based on physical direction ?.
 bool LayoutBox::hasOverrideContainingBlockLogicalHeight() const
 {
     return m_rareData && m_rareData->m_hasOverrideContainingBlockContentLogicalHeight;
 }
 
 // TODO (lajava) Shouldn't we implement these functions based on physical direction ?.
 void LayoutBox::setOverrideContainingBlockContentLogicalWidth(LayoutUnit logicalWidth)
 {
+    DCHECK_GE(logicalWidth, LayoutUnit(-1));
     ensureRareData().m_overrideContainingBlockContentLogicalWidth = logicalWidth;
     ensureRareData().m_hasOverrideContainingBlockContentLogicalWidth = true;
 }
 
 // TODO (lajava) Shouldn't we implement these functions based on physical direction ?.
 void LayoutBox::setOverrideContainingBlockContentLogicalHeight(LayoutUnit logicalHeight)
 {
+    DCHECK_GE(logicalHeight, LayoutUnit(-1));
     ensureRareData().m_overrideContainingBlockContentLogicalHeight = logicalHeight;
     ensureRareData().m_hasOverrideContainingBlockContentLogicalHeight = true;
 }
 
 // TODO (lajava) Shouldn't we implement these functions based on physical direction ?.
 void LayoutBox::clearContainingBlockOverrideSize()
 {
     if (!m_rareData)
         return;
     ensureRareData().m_hasOverrideContainingBlockContentLogicalWidth = false;
@@ skipping 3642 matching lines @@
         m_rareData->m_snapAreas->remove(&snapArea);
     }
 }
 
 SnapAreaSet* LayoutBox::snapAreas() const
 {
     return m_rareData ? m_rareData->m_snapAreas.get() : nullptr;
 }
 
 } // namespace blink