Re-enable advanced blend with a blacklist

include/gpu/GrCaps.h

Index: include/gpu/GrCaps.h
diff --git a/include/gpu/GrCaps.h b/include/gpu/GrCaps.h
index f219cb23e03293197aad7e4590c2e766de03c6d2..6dc42998f9e0689e5ebcd6f907e7115b9b2e11a4 100644
--- a/include/gpu/GrCaps.h
+++ b/include/gpu/GrCaps.h
@@ -11,6 +11,7 @@
 #include "GrTypes.h"
 #include "GrTypesPriv.h"
 #include "GrShaderVar.h"
+#include "GrXferProcessor.h"
 #include "SkRefCnt.h"
 #include "SkString.h"
 
@@ -158,6 +159,10 @@ public:
         return kAdvancedCoherent_BlendEquationSupport == fBlendEquationSupport;
     }
 
+    bool advancedBlendEquationIsBlacklist(GrBlendEquation equation) const {
+        return fAdvBlendEqBlacklist & (1 << equation);
+    }
+
     /**
      * Indicates whether GPU->CPU memory mapping for GPU resources such as vertex buffers and
      * textures allows partial mappings or full mappings.
@@ -229,6 +234,9 @@ protected:
     bool fUseDrawInsteadOfClear         : 1;
 
     BlendEquationSupport fBlendEquationSupport;
+    uint32_t fAdvBlendEqBlacklist;
+    GR_STATIC_ASSERT(kLast_GrBlendEquation < 32);
+
     uint32_t fMapBufferFlags;
     int fGeometryBufferMapThreshold;