Add XferProcessor factory in GrPaint and GrDrawState.

src/gpu/GrDistanceFieldTextContext.cpp

Index: src/gpu/GrDistanceFieldTextContext.cpp
diff --git a/src/gpu/GrDistanceFieldTextContext.cpp b/src/gpu/GrDistanceFieldTextContext.cpp
index a012bc28b7f9e2929b8349ee4ed5e43d6ae74e05..06eb8489e08aebbc7b90cff5aee0df3e1bd8c680 100755
--- a/src/gpu/GrDistanceFieldTextContext.cpp
+++ b/src/gpu/GrDistanceFieldTextContext.cpp
@@ -660,9 +660,8 @@ void GrDistanceFieldTextContext::flush() {
         // Set draw state
         if (fUseLCDText) {
             GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor);
-            if (kOne_GrBlendCoeff != fPaint.getSrcBlendCoeff() ||
-                kISA_GrBlendCoeff != fPaint.getDstBlendCoeff() ||
-                fPaint.numColorStages()) {
+            SkASSERT(drawState.hasXPFactory());
+            if (!drawState.getXPFactory()->supportsLCDText(drawState)) {
                 SkDebugf("LCD Text will not draw correctly.\n");
             }
             SkASSERT(!drawState.hasColorVertexAttribute());