Fix missed invalidation in markFixedPositionObjectForLayoutIfNeeded.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  *               All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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 680 matching lines @@
   // We must compute child's width and height, but not update them now.
   // The child will update its width and height when it gets laid out, and needs
   // to see them change there.
   LayoutBox* box = toLayoutBox(child);
   if (hasStaticInlinePosition) {
     LogicalExtentComputedValues computedValues;
     box->computeLogicalWidth(computedValues);
     LayoutUnit newLeft = computedValues.m_position;
     if (newLeft != box->logicalLeft())
       layoutScope.setChildNeedsLayout(child);
-  } else if (hasStaticBlockPosition) {
+  }
+  if (hasStaticBlockPosition) {
     LogicalExtentComputedValues computedValues;
     box->computeLogicalHeight(computedValues);
     LayoutUnit newTop = computedValues.m_position;
     if (newTop != box->logicalTop())
       layoutScope.setChildNeedsLayout(child);
   }
 }
 
 LayoutUnit LayoutBlock::marginIntrinsicLogicalWidthForChild(
     const LayoutBox& child) const {
@@ skipping 1493 matching lines @@
   }
 
   return availableHeight;
 }
 
 bool LayoutBlock::hasDefiniteLogicalHeight() const {
   return availableLogicalHeightForPercentageComputation() != LayoutUnit(-1);
 }
 
 }  // namespace blink