Skip temp texture when config conversion test has already failed.

include/gpu/GrContext.h

Index: include/gpu/GrContext.h
diff --git a/include/gpu/GrContext.h b/include/gpu/GrContext.h
index 65fac230ccabd8eb7b2a650eba3e62b99b843bd2..c4691e4652e6c811755a8ca23abb54ac4949075d 100644
--- a/include/gpu/GrContext.h
+++ b/include/gpu/GrContext.h
@@ -445,6 +445,9 @@ private:
                                                    bool swapRAndB, const SkMatrix&);
     const GrFragmentProcessor* createUPMToPMEffect(GrProcessorDataManager*, GrTexture*,
                                                    bool swapRAndB, const SkMatrix&);
+    /** Returns true if we've already determined that createPMtoUPMEffect and createUPMToPMEffect
+        will fail. In such cases fall back to SW conversion. */
+    bool didFailPMUPMConversionTest() const;
 
     /**
      *  This callback allows the resource cache to callback into the GrContext