Fix SVG relayout problem that occurs when only the viewport height changes.

Source/core/rendering/RenderView.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 251 matching lines @@
     bool relayoutChildren = !shouldUsePrintingLayout() && (!m_frameView || width() != viewWidth() || height() != viewHeight());
     if (relayoutChildren) {
         setChildNeedsLayout(true, MarkOnlyThis);
         for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
             if ((child->isBox() && toRenderBox(child)->hasRelativeLogicalHeight())
                     || child->style()->logicalHeight().isPercent()
                     || child->style()->logicalMinHeight().isPercent()
                     || child->style()->logicalMaxHeight().isPercent()
                     || child->style()->logicalHeight().isViewportPercentage()
                     || child->style()->logicalMinHeight().isViewportPercentage()
-                    || child->style()->logicalMaxHeight().isViewportPercentage())
+                    || child->style()->logicalMaxHeight().isViewportPercentage()
+                    || child->isSVGRoot())
                 child->setChildNeedsLayout(true, MarkOnlyThis);
         }
     }
 
     ASSERT(!m_layoutState);
     if (!needsLayout())
         return;
 
     LayoutState state;
     bool isSeamlessAncestorInFlowThread = initializeLayoutState(state);
@@ skipping 859 matching lines @@
 #endif
 
     if (layoutState)
         layoutState->m_isPaginated = m_fragmenting;
         
     if (m_flowThreadState != RenderObject::NotInsideFlowThread)
         m_root->setFlowThreadStateIncludingDescendants(m_flowThreadState);
 }
 
 } // namespace WebCore