Enable stencil clipping in mixed sampled render targets

include/gpu/GrCaps.h

Index: include/gpu/GrCaps.h
diff --git a/include/gpu/GrCaps.h b/include/gpu/GrCaps.h
index 248135d691f20fa3d82884a1b8449ee5ff7e5d54..0f376f9e5abd157a1088c4bd8fd0814d1ba1c581 100644
--- a/include/gpu/GrCaps.h
+++ b/include/gpu/GrCaps.h
@@ -63,6 +63,7 @@ public:
     bool dstReadInShaderSupport() const { return fDstReadInShaderSupport; }
     bool dualSourceBlendingSupport() const { return fDualSourceBlendingSupport; }
     bool mixedSamplesSupport() const { return fMixedSamplesSupport; }
+    bool programmableSampleLocationsSupport() const { return fProgrammableSampleLocationsSupport; }
 
     /**
     * Get the precision info for a variable of type kFloat_GrSLType, kVec2f_GrSLType, etc in a
@@ -93,6 +94,7 @@ protected:
     bool fDstReadInShaderSupport : 1;
     bool fDualSourceBlendingSupport : 1;
     bool fMixedSamplesSupport : 1;
+    bool fProgrammableSampleLocationsSupport : 1;
 
     bool fShaderPrecisionVaries;
     PrecisionInfo fFloatPrecisions[kGrShaderTypeCount][kGrSLPrecisionCount];