make GR_TEST_UTILS=0 work

Change-Id: Icce35140ca08b65217b32e6b1ffc6ad2f38ab37f
Reviewed-on: https://skia-review.googlesource.com/7840
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/src/effects/SkDisplacementMapEffect.cpp b/src/effects/SkDisplacementMapEffect.cpp
index 9693191..67fb761 100644
--- a/src/effects/SkDisplacementMapEffect.cpp
+++ b/src/effects/SkDisplacementMapEffect.cpp
@@ -537,6 +537,7 @@
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrDisplacementMapEffect);
 
+#if GR_TEST_UTILS
 sk_sp<GrFragmentProcessor> GrDisplacementMapEffect::TestCreate(GrProcessorTestData* d) {
     int texIdxDispl = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx :
                                                GrProcessorUnitTest::kAlphaTextureIdx;
@@ -560,6 +561,7 @@
                                          d->fTextures[texIdxColor], colorSpaceXform,
                                          colorDimensions);
 }
+#endif
 
 ///////////////////////////////////////////////////////////////////////////////