Don't always full invalidate on change of align-content, align-items and align-self.

Source/core/rendering/style/RenderStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 423 matching lines @@
     if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
         if (rareNonInheritedData->m_appearance != other.rareNonInheritedData->m_appearance
             || rareNonInheritedData->marginBeforeCollapse != other.rareNonInheritedData->marginBeforeCollapse
             || rareNonInheritedData->marginAfterCollapse != other.rareNonInheritedData->marginAfterCollapse
             || rareNonInheritedData->lineClamp != other.rareNonInheritedData->lineClamp
             || rareNonInheritedData->textOverflow != other.rareNonInheritedData->textOverflow
             || rareNonInheritedData->m_wrapFlow != other.rareNonInheritedData->m_wrapFlow
             || rareNonInheritedData->m_wrapThrough != other.rareNonInheritedData->m_wrapThrough
             || rareNonInheritedData->m_shapeMargin != other.rareNonInheritedData->m_shapeMargin
             || rareNonInheritedData->m_order != other.rareNonInheritedData->m_order
-            || rareNonInheritedData->m_alignContent != other.rareNonInheritedData->m_alignContent
-            || rareNonInheritedData->m_alignItems != other.rareNonInheritedData->m_alignItems
-            || rareNonInheritedData->m_alignSelf != other.rareNonInheritedData->m_alignSelf
             || rareNonInheritedData->m_justifyContent != other.rareNonInheritedData->m_justifyContent
             || rareNonInheritedData->m_grid.get() != other.rareNonInheritedData->m_grid.get()
             || rareNonInheritedData->m_gridItem.get() != other.rareNonInheritedData->m_gridItem.get()
             || rareNonInheritedData->m_textCombine != other.rareNonInheritedData->m_textCombine
             || rareNonInheritedData->hasFilters() != other.rareNonInheritedData->hasFilters())
             return true;
 
         if (rareNonInheritedData->m_deprecatedFlexibleBox.get() != other.rareNonInheritedData->m_deprecatedFlexibleBox.get()
             && *rareNonInheritedData->m_deprecatedFlexibleBox.get() != *other.rareNonInheritedData->m_deprecatedFlexibleBox.get())
             return true;
@@ skipping 154 matching lines @@
         return true;
 
     if (surround.get() != other.surround.get()) {
         if (surround->margin != other.surround->margin)
             return true;
 
         if (surround->padding != other.surround->padding)
             return true;
     }
 
+    if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
+        if (rareNonInheritedData->m_alignContent != other.rareNonInheritedData->m_alignContent
+            || rareNonInheritedData->m_alignItems != other.rareNonInheritedData->m_alignItems
+            || rareNonInheritedData->m_alignSelf != other.rareNonInheritedData->m_alignSelf)
+            return true;
+    }
+
     return false;
 }
 
 bool RenderStyle::diffNeedsPaintInvalidationLayer(const RenderStyle& other) const
 {
     if (position() != StaticPosition && (visual->clip != other.visual->clip || visual->hasAutoClip != other.visual->hasAutoClip))
         return true;
 
     if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
         if (RuntimeEnabledFeatures::cssCompositingEnabled()
@@ skipping 1060 matching lines @@
     // right
     radiiSum = radii.topRight().height() + radii.bottomRight().height();
     if (radiiSum > rect.height())
         factor = std::min(rect.height() / radiiSum, factor);
 
     ASSERT(factor <= 1);
     return factor;
 }
 
 } // namespace blink