Have Node::document() return a reference instead of a pointer

Source/core/rendering/svg/SVGInlineTextBox.cpp

Index: Source/core/rendering/svg/SVGInlineTextBox.cpp
diff --git a/Source/core/rendering/svg/SVGInlineTextBox.cpp b/Source/core/rendering/svg/SVGInlineTextBox.cpp
index 0a08afbed09a9e873c616604df0f4f3a0d79d424..882ddcda3acbf3d9670b271cd975bf65f705ade6 100644
--- a/Source/core/rendering/svg/SVGInlineTextBox.cpp
+++ b/Source/core/rendering/svg/SVGInlineTextBox.cpp
@@ -197,7 +197,7 @@ void SVGInlineTextBox::paintSelectionBackground(PaintInfo& paintInfo)
 
     RenderObject* parentRenderer = parent()->renderer();
     ASSERT(parentRenderer);
-    ASSERT(!parentRenderer->document()->printing());
+    ASSERT(!parentRenderer->document().printing());
 
     // Determine whether or not we're selected.
     bool paintSelectedTextOnly = paintInfo.phase == PaintPhaseSelection;
@@ -270,7 +270,7 @@ void SVGInlineTextBox::paint(PaintInfo& paintInfo, const LayoutPoint&, LayoutUni
     ASSERT(parentRenderer);
 
     bool paintSelectedTextOnly = paintInfo.phase == PaintPhaseSelection;
-    bool hasSelection = !parentRenderer->document()->printing() && selectionState() != RenderObject::SelectionNone;
+    bool hasSelection = !parentRenderer->document().printing() && selectionState() != RenderObject::SelectionNone;
     if (!hasSelection && paintSelectedTextOnly)
         return;