Further cleanup in FilterEffectRenderer.

Source/platform/graphics/filters/FETurbulence.cpp

Index: Source/platform/graphics/filters/FETurbulence.cpp
diff --git a/Source/platform/graphics/filters/FETurbulence.cpp b/Source/platform/graphics/filters/FETurbulence.cpp
index b1e12ac23097525531f6847426fe2db1526cff6b..24d0c0c7988f131a813d0954830bf966fc8d5c0c 100644
--- a/Source/platform/graphics/filters/FETurbulence.cpp
+++ b/Source/platform/graphics/filters/FETurbulence.cpp
@@ -137,9 +137,8 @@ SkShader* FETurbulence::createShader()
     // and not the target bounding box scale (as SVGFilter::apply*Scale()
     // would do). Note also that we divide by the scale since this is
     // a frequency, not a period.
-    const AffineTransform& absoluteTransform = filter()->absoluteTransform();
-    float baseFrequencyX = m_baseFrequencyX / absoluteTransform.a();
-    float baseFrequencyY = m_baseFrequencyY / absoluteTransform.d();
+    float baseFrequencyX = m_baseFrequencyX / filter()->scale();
+    float baseFrequencyY = m_baseFrequencyY / filter()->scale();
     return (type() == FETURBULENCE_TYPE_FRACTALNOISE) ?
         SkPerlinNoiseShader::CreateFractalNoise(SkFloatToScalar(baseFrequencyX),
             SkFloatToScalar(baseFrequencyY), numOctaves(), SkFloatToScalar(seed()),