Revert of Extract most of the mutable state of SkShader into a separate Context object.

include/effects/SkPerlinNoiseShader.h

Index: include/effects/SkPerlinNoiseShader.h
diff --git a/include/effects/SkPerlinNoiseShader.h b/include/effects/SkPerlinNoiseShader.h
index 5b270293b16a19b70db7878e67ceb1242772e01e..dfd5a8c1e72da46d4332369e98e81c7983695ca6 100644
--- a/include/effects/SkPerlinNoiseShader.h
+++ b/include/effects/SkPerlinNoiseShader.h
@@ -72,32 +72,10 @@
     }
 
 
-    virtual SkShader::Context* createContext(
-        const SkBitmap& device, const SkPaint& paint,
-        const SkMatrix& matrix, void* storage) const SK_OVERRIDE;
-    virtual size_t contextSize() const SK_OVERRIDE;
-
-    class PerlinNoiseShaderContext : public SkShader::Context {
-    public:
-        PerlinNoiseShaderContext(const SkPerlinNoiseShader& shader, const SkBitmap& device,
-                                 const SkPaint& paint, const SkMatrix& matrix);
-        virtual ~PerlinNoiseShaderContext() {}
-
-        virtual void shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE;
-        virtual void shadeSpan16(int x, int y, uint16_t[], int count) SK_OVERRIDE;
-
-    private:
-        SkPMColor shade(const SkPoint& point, StitchData& stitchData) const;
-        SkScalar calculateTurbulenceValueForPoint(
-            int channel, const PaintingData& paintingData,
-            StitchData& stitchData, const SkPoint& point) const;
-        SkScalar noise2D(int channel, const PaintingData& paintingData,
-                         const StitchData& stitchData, const SkPoint& noiseVector) const;
-
-        SkMatrix fMatrix;
-
-        typedef SkShader::Context INHERITED;
-    };
+    virtual bool setContext(const SkBitmap& device, const SkPaint& paint,
+                            const SkMatrix& matrix);
+    virtual void shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE;
+    virtual void shadeSpan16(int x, int y, uint16_t[], int count) SK_OVERRIDE;
 
     virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint&) const SK_OVERRIDE;
 
@@ -114,6 +92,14 @@
                         const SkISize* tileSize);
     virtual ~SkPerlinNoiseShader();
 
+    SkScalar noise2D(int channel, const PaintingData& paintingData,
+                     const StitchData& stitchData, const SkPoint& noiseVector) const;
+
+    SkScalar calculateTurbulenceValueForPoint(int channel, const PaintingData& paintingData,
+                                              StitchData& stitchData, const SkPoint& point) const;
+
+    SkPMColor shade(const SkPoint& point, StitchData& stitchData) const;
+
     // TODO (scroggo): Once all SkShaders are created from a factory, and we have removed the
     // constructor that creates SkPerlinNoiseShader from an SkReadBuffer, several fields can
     // be made constant.
@@ -124,6 +110,8 @@
     /*const*/ SkScalar                  fSeed;
     /*const*/ SkISize                   fTileSize;
     /*const*/ bool                      fStitchTiles;
+    // TODO (scroggo): Once setContext creates a new object, place this on that object.
+    SkMatrix fMatrix;
 
     PaintingData* fPaintingData;