remove view matrix from context

include/core/SkShader.h

Index: include/core/SkShader.h
diff --git a/include/core/SkShader.h b/include/core/SkShader.h
index 8018cd44fff37dfa9858d6e6c0d31cf39e2cb895..7cfb53619aa973b5ccc7c429451f73240f3e4106 100644
--- a/include/core/SkShader.h
+++ b/include/core/SkShader.h
@@ -384,8 +384,12 @@ public:
      *
      *  The GrContext may be used by the effect to create textures. The GPU device does not
      *  call createContext. Instead we pass the SkPaint here in case the shader needs paint info.
+     *
+     *  A view matrix is always required to create the correct GrFragmentProcessor.  Some shaders
+     *  may also use the optional localMatrix to define a matrix relevant only for sampling.
      */
-    virtual bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix*, GrColor*,
+    virtual bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix& viewM,
+                                     const SkMatrix* localMatrix, GrColor*,
                                      GrFragmentProcessor**) const;
 
     /**