Move most of the transform logic into the primitive processors

src/gpu/gl/builders/GrGLFragmentShaderBuilder.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLFragmentShaderBuilder_DEFINED
 #define GrGLFragmentShaderBuilder_DEFINED
 
@@ skipping 30 matching lines @@
      */
     virtual SkString ensureFSCoords2D(const GrGLProcessor::TransformedCoordsArray& coords,
                                       int index) = 0;
 
 
     /** Returns a variable name that represents the position of the fragment in the FS. The position
         is in device space (e.g. 0,0 is the top left and pixel centers are at half-integers). */
     virtual const char* fragmentPosition() = 0;
 
 private:
+    friend class GrGLNormalPathProcessor;
+
     typedef GrGLShaderBuilder INHERITED;
 };
 
 /*
  * Fragment processor's, in addition to all of the above, may need to use dst color so they use
  * this builder to create their shader.  Because this is the only shader builder the FP sees, we
  * just call it FPShaderBuilder
  */
 class GrGLFPFragmentBuilder : public GrGLGPFragmentBuilder {
 public:
@@ skipping 85 matching lines @@
     bool fHasSecondaryOutput;
     bool fSetupFragPosition;
     bool fTopLeftFragPosRead;
     int  fCustomColorOutputIndex;
 
     // some state to verify shaders and effects are consistent, this is reset between effects by
     // the program creator
     bool fHasReadDstColor;
     bool fHasReadFragmentPosition;
 
-    friend class GrGLNvprProgramBuilder;
     friend class GrGLProgramBuilder;
 
     typedef GrGLFPFragmentBuilder INHERITED;
 };
 
 #endif