Added Skia turbulence filter to Webkit.

Source/core/platform/graphics/filters/FETurbulence.h

Index: Source/core/platform/graphics/filters/FETurbulence.h
diff --git a/Source/core/platform/graphics/filters/FETurbulence.h b/Source/core/platform/graphics/filters/FETurbulence.h
index 0b3b51f2a88c6dc3203e983a68ccfc61db0c4a81..8160d91db6e8ac0ed3afacda2412db5459495c2c 100644
--- a/Source/core/platform/graphics/filters/FETurbulence.h
+++ b/Source/core/platform/graphics/filters/FETurbulence.h
@@ -116,6 +116,9 @@ private:
     FETurbulence(Filter*, TurbulenceType, float, float, int, float, bool);
 
     virtual void applySoftware() OVERRIDE;
+    virtual bool platformApplySkia();

[Stephen White, 2013/06/13 17:28:06]

The base class version of this function was renamed to applySkia(), so this
probably isn't getting called. It should also be marked OVERRIDE, which would
catch this error.

[sugoi, 2013/06/13 17:46:33]

Done.

+    virtual SkImageFilter* createImageFilter(SkiaImageFilterBuilder*);
+    SkShader* createShader(const IntRect& filterRegion) const;
 
     inline void initPaint(PaintingData&);
     float noise2D(int channel, PaintingData&, StitchData&, const FloatPoint&);