enforce 16byte alignment in shader contexts

experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.h

Index: experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.h
diff --git a/experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.h b/experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.h
index a129ef8bcda97bcf7590a04ab46027018f0c20a4..fac098ab52194c9b72feee0908d4244080efc0f8 100644
--- a/experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.h
+++ b/experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.h
@@ -80,12 +80,9 @@ public:
     static SkShader* CreateTubulence(SkScalar baseFrequencyX, SkScalar baseFrequencyY,
                                      int numOctaves, SkScalar seed,
                                      const SkISize* tileSize = NULL) {
-    return CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves, seed, tileSize);
+        return CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves, seed, tileSize);
     }
 
-
-    size_t contextSize(const ContextRec&) const override;
-
     class PerlinNoiseShaderContext : public SkShader::Context {
     public:
         PerlinNoiseShaderContext(const SkPerlinNoiseShader2& shader, const ContextRec&);
@@ -118,6 +115,7 @@ public:
 
 protected:
     void flatten(SkWriteBuffer&) const override;
+    size_t onContextSize(const ContextRec&) const override;
     Context* onCreateContext(const ContextRec&, void* storage) const override;
 
 private: