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

Source/core/svg/SVGFEConvolveMatrixElement.cpp

 /*
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 117 matching lines @@
     if (name == SVGNames::inAttr) {
         setIn1BaseValue(value);
         return;
     }
 
     if (name == SVGNames::orderAttr) {
         float x, y;
         if (parseNumberOptionalNumber(value, x, y) && x >= 1 && y >= 1) {
             setOrderXBaseValue(x);
             setOrderYBaseValue(y);
-        } else
-            document()->accessSVGExtensions()->reportWarning(
+        } else {
+            document().accessSVGExtensions()->reportWarning(
                 "feConvolveMatrix: problem parsing order=\"" + value
                 + "\". Filtered element will not be displayed.");
+        }
         return;
     }
 
     if (name == SVGNames::edgeModeAttr) {
         EdgeModeType propertyValue = SVGPropertyTraits<EdgeModeType>::fromString(value);
         if (propertyValue > 0)
             setEdgeModeBaseValue(propertyValue);
         else
-            document()->accessSVGExtensions()->reportWarning(
+            document().accessSVGExtensions()->reportWarning(
                 "feConvolveMatrix: problem parsing edgeMode=\"" + value
                 + "\". Filtered element will not be displayed.");
         return;
     }
 
     if (name == SVGNames::kernelMatrixAttr) {
         SVGNumberList newList;
         newList.parse(value);
         detachAnimatedKernelMatrixListWrappers(newList.size());
         setKernelMatrixBaseValue(newList);
         return;
     }
 
     if (name == SVGNames::divisorAttr) {
         float divisor = value.toFloat();
         if (divisor)
             setDivisorBaseValue(divisor);
         else
-            document()->accessSVGExtensions()->reportWarning(
+            document().accessSVGExtensions()->reportWarning(
                 "feConvolveMatrix: problem parsing divisor=\"" + value
                 + "\". Filtered element will not be displayed.");
         return;
     }
 
     if (name == SVGNames::biasAttr) {
         setBiasBaseValue(value.toFloat());
         return;
     }
 
     if (name == SVGNames::targetXAttr) {
         setTargetXBaseValue(value.string().toUIntStrict());
         return;
     }
 
     if (name == SVGNames::targetYAttr) {
         setTargetYBaseValue(value.string().toUIntStrict());
         return;
     }
 
     if (name == SVGNames::kernelUnitLengthAttr) {
         float x, y;
         if (parseNumberOptionalNumber(value, x, y) && x > 0 && y > 0) {
             setKernelUnitLengthXBaseValue(x);
             setKernelUnitLengthYBaseValue(y);
-        } else
-            document()->accessSVGExtensions()->reportWarning(
+        } else {
+            document().accessSVGExtensions()->reportWarning(
                 "feConvolveMatrix: problem parsing kernelUnitLength=\"" + value
                 + "\". Filtered element will not be displayed.");
+        }
         return;
     }
 
     if (name == SVGNames::preserveAlphaAttr) {
         if (value == "true")
             setPreserveAlphaBaseValue(true);
         else if (value == "false")
             setPreserveAlphaBaseValue(false);
         else
-            document()->accessSVGExtensions()->reportWarning(
+            document().accessSVGExtensions()->reportWarning(
                 "feConvolveMatrix: problem parsing preserveAlphaAttr=\"" + value
                 + "\". Filtered element will not be displayed.");
         return;
     }
 
     ASSERT_NOT_REACHED();
 }
 
 bool SVGFEConvolveMatrixElement::setFilterEffectAttribute(FilterEffect* effect, const QualifiedName& attrName)
 {
@@ skipping 118 matching lines @@
 
     RefPtr<FilterEffect> effect = FEConvolveMatrix::create(filter,
                     IntSize(orderXValue, orderYValue), divisorValue,
                     biasCurrentValue(), IntPoint(targetXValue, targetYValue), edgeModeCurrentValue(),
                     FloatPoint(kernelUnitLengthXValue, kernelUnitLengthYValue), preserveAlphaCurrentValue(), kernelMatrix.toFloatVector());
     effect->inputEffects().append(input1);
     return effect.release();
 }
 
 } // namespace WebCore