Replace fWillReadFragmentPosition with a bitfield

src/effects/SkBlurMaskFilter.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlurMaskFilter.h"
 #include "SkBlurMask.h"
 #include "SkGpuBlurUtils.h"
@@ skipping 793 matching lines @@
 }
 
 GrRectBlurEffect::GrRectBlurEffect(const SkRect& rect, float sigma, GrTexture *blurProfile,
                                    GrSLPrecision precision)
     : fRect(rect)
     , fSigma(sigma)
     , fBlurProfileAccess(blurProfile)
     , fPrecision(precision) {
     this->initClassID<GrRectBlurEffect>();
     this->addTextureAccess(&fBlurProfileAccess);
-    this->setWillReadFragmentPosition();
+    this->enableBuiltInState(kFragmentPosition_BuiltInState);
 }
 
 void GrRectBlurEffect::onGetGLSLProcessorKey(const GrGLSLCaps& caps,
                                              GrProcessorKeyBuilder* b) const {
     GrGLRectBlurEffect::GenKey(*this, caps, b);
 }
 
 GrGLSLFragmentProcessor* GrRectBlurEffect::onCreateGLSLInstance() const {
     return new GrGLRectBlurEffect;
 }
@@ skipping 187 matching lines @@
 void GrRRectBlurEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
     inout->mulByUnknownSingleComponent();
 }
 
 GrRRectBlurEffect::GrRRectBlurEffect(float sigma, const SkRRect& rrect, GrTexture *ninePatchTexture)
     : fRRect(rrect),
       fSigma(sigma),
       fNinePatchAccess(ninePatchTexture) {
     this->initClassID<GrRRectBlurEffect>();
     this->addTextureAccess(&fNinePatchAccess);
-    this->setWillReadFragmentPosition();
+    this->enableBuiltInState(kFragmentPosition_BuiltInState);
 }
 
 bool GrRRectBlurEffect::onIsEqual(const GrFragmentProcessor& other) const {
     const GrRRectBlurEffect& rrbe = other.cast<GrRRectBlurEffect>();
     return fRRect.getSimpleRadii().fX == rrbe.fRRect.getSimpleRadii().fX && fSigma == rrbe.fSigma;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrRRectBlurEffect);
@@ skipping 271 matching lines @@
     } else {
         str->append("None");
     }
     str->append("))");
 }
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkBlurMaskFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END