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

Source/core/rendering/RenderView.cpp

Index: Source/core/rendering/RenderView.cpp
diff --git a/Source/core/rendering/RenderView.cpp b/Source/core/rendering/RenderView.cpp
index 83e5e8ba6bfbce75709d238c469209bceb8b31e2..0501515b4aae0e96d135764da54048d6bf51071f 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -269,7 +269,8 @@ void RenderView::layout()
                     || 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);
         }
     }