Move most of the transform logic into the primitive processors

src/gpu/gl/builders/GrGLFragmentShaderBuilder.h

Index: src/gpu/gl/builders/GrGLFragmentShaderBuilder.h
diff --git a/src/gpu/gl/builders/GrGLFragmentShaderBuilder.h b/src/gpu/gl/builders/GrGLFragmentShaderBuilder.h
index 456ec4f27cddb7eec0253444bf97bcc33f78a30b..452115bef327f065fae557c29cd1536bbb242881 100644
--- a/src/gpu/gl/builders/GrGLFragmentShaderBuilder.h
+++ b/src/gpu/gl/builders/GrGLFragmentShaderBuilder.h
@@ -48,6 +48,8 @@ public:
     virtual const char* fragmentPosition() = 0;
 
 private:
+    friend class GrGLNormalPathProcessor;
+
     typedef GrGLShaderBuilder INHERITED;
 };
 
@@ -153,7 +155,6 @@ private:
     bool fHasReadDstColor;
     bool fHasReadFragmentPosition;
 
-    friend class GrGLNvprProgramBuilder;
     friend class GrGLProgramBuilder;
 
     typedef GrGLFPFragmentBuilder INHERITED;