Make all blending up to GrOptDrawState be handled by the xp/xp factory.

tests/GLProgramsTest.cpp

Index: tests/GLProgramsTest.cpp
diff --git a/tests/GLProgramsTest.cpp b/tests/GLProgramsTest.cpp
index 7b73fdc510dd36306c1baf0518806eb7b19a8a72..e3495b941246b26a10aad2e5cc04c516b850f026 100644
--- a/tests/GLProgramsTest.cpp
+++ b/tests/GLProgramsTest.cpp
@@ -17,10 +17,12 @@
 #include "GrOptDrawState.h"
 #include "GrTBackendProcessorFactory.h"
 #include "GrTest.h"
+#include "GrXferProcessor.h"
 #include "SkChecksum.h"
 #include "SkRandom.h"
 #include "Test.h"
 #include "effects/GrConfigConversionEffect.h"
+#include "effects/GrPorterDuffXferProcessor.h"
 #include "gl/GrGLPathRendering.h"
 #include "gl/GrGpuGL.h"
 #include "gl/builders/GrGLProgramBuilder.h"
@@ -266,7 +268,8 @@ static void set_random_blend_func(GrDrawState* ds, SkRandom* random) {
         dst = GrBlendCoeff(random->nextRangeU(kFirstPublicGrBlendCoeff, kLastPublicGrBlendCoeff));
     } while (GrBlendCoeffRefsDst(dst));
 
-    ds->setBlendFunc(src, dst);
+    GrXPFactory* xpFactory = GrPorterDuffXPFactory::Create(src, dst);
+    ds->setXPFactory(xpFactory)->unref();
 }
 
 // right now, the only thing we seem to care about in drawState's stencil is 'doesWrite()'