Add "sample locations" feature to GrProcessor

src/gpu/gl/GrGLProgramDesc.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrGLProgramDesc.h"
 
 #include "GrProcessor.h"
 #include "GrPipeline.h"
@@ skipping 145 matching lines @@
 
     if (pipeline.ignoresCoverage()) {
         header->fIgnoresCoverage = 1;
     } else {
         header->fIgnoresCoverage = 0;
     }
 
     header->fSnapVerticesToPixelCenters = pipeline.snapVerticesToPixelCenters();
     header->fColorEffectCnt = pipeline.numColorFragmentProcessors();
     header->fCoverageEffectCnt = pipeline.numCoverageFragmentProcessors();
+
+    if (pipeline.hasSampleLocations()) {
+        header->fSamplePatternKey = pipeline.getSamplePatternID();
+    } else {
+        header->fSamplePatternKey = 0;
+    }
+
     glDesc->finalize();
     return true;
 }