Update handling of negative std.dev for feGaussianblur/feDropShadow

Source/platform/graphics/filters/FEDropShadow.h

 /*
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  * Copyright (C) 2013 Google 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 12 matching lines @@
 
 #include "platform/graphics/Color.h"
 #include "platform/graphics/filters/FilterEffect.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT FEDropShadow : public FilterEffect {
 public:
     static PassRefPtrWillBeRawPtr<FEDropShadow> create(Filter*, float, float, float, float, const Color&, float);
 
-    float stdDeviationX() const { return m_stdX; }
-    void setStdDeviationX(float stdX) { m_stdX = stdX; }
-
-    float stdDeviationY() const { return m_stdY; }
-    void setStdDeviationY(float stdY) { m_stdY = stdY; }
-
-    float dx() const { return m_dx; }
-    void setDx(float dx) { m_dx = dx; }
-
-    float dy() const { return m_dy; }
-    void setDy(float dy) { m_dy = dy; }
-
-    Color shadowColor() const { return m_shadowColor; }
-    void setShadowColor(const Color& shadowColor) { m_shadowColor = shadowColor; }
-
-    float shadowOpacity() const { return m_shadowOpacity; }
-    void setShadowOpacity(float shadowOpacity) { m_shadowOpacity = shadowOpacity; }
-
     FloatRect mapRect(const FloatRect&, bool forward = true) final;
 
     TextStream& externalRepresentation(TextStream&, int indention) const override;
     PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) override;
 
 private:
     FEDropShadow(Filter*, float, float, float, float, const Color&, float);
 
     float m_stdX;
     float m_stdY;
     float m_dx;
     float m_dy;
     Color m_shadowColor;
     float m_shadowOpacity;
 };
 
 } // namespace blink
 
 #endif // FEDropShadow_h