Revert of Create xfer processor backend.

tests/GLProgramsTest.cpp

Index: tests/GLProgramsTest.cpp
diff --git a/tests/GLProgramsTest.cpp b/tests/GLProgramsTest.cpp
index 953b5e07cbcc45e05dd07a25871f4bf316a3fcdc..253e4aeccc265ceff7c58582a261c8cbc0f6abdf 100644
--- a/tests/GLProgramsTest.cpp
+++ b/tests/GLProgramsTest.cpp
@@ -121,14 +121,6 @@
     return SkRef(texture->asRenderTarget());
 }
 
-static void set_random_xpf(GrContext* context, const GrDrawTargetCaps& caps, GrDrawState* ds,
-                           SkRandom* random, GrTexture* dummyTextures[]) {
-    SkAutoTUnref<const GrXPFactory> xpf(
-        GrProcessorTestFactory<GrXPFactory>::CreateStage(random, context, caps, dummyTextures));
-    SkASSERT(xpf);
-    ds->setXPFactory(xpf.get());
-}
-
 static void set_random_gp(GrContext* context,
                           const GrDrawTargetCaps& caps,
                           GrDrawState* ds,
@@ -201,6 +193,22 @@
         state |= random->nextBool() * i;
     }
     ds->enableState(state);
+}
+
+// this function will randomly pick non-self referencing blend modes
+static void set_random_blend_func(GrDrawState* ds, SkRandom* random) {
+    GrBlendCoeff src;
+    do {
+        src = GrBlendCoeff(random->nextRangeU(kFirstPublicGrBlendCoeff, kLastPublicGrBlendCoeff));
+    } while (GrBlendCoeffRefsSrc(src));
+
+    GrBlendCoeff dst;
+    do {
+        dst = GrBlendCoeff(random->nextRangeU(kFirstPublicGrBlendCoeff, kLastPublicGrBlendCoeff));
+    } while (GrBlendCoeffRefsDst(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()'
@@ -302,12 +310,9 @@
                                          usePathRendering,
                                          &random,
                                          dummyTextures);
-
-        // creates a random xfer processor factory on the draw state 
-        set_random_xpf(fContext, gpu->glCaps(), &ds, &random, dummyTextures);
-
         set_random_hints(&ds, &random);
         set_random_state(&ds, &random);
+        set_random_blend_func(&ds, &random);
         set_random_stencil(&ds, &random);
 
         GrDeviceCoordTexture dstCopy;