Auto-compare GrProcessors' texture accesses in isEqual().

R=joshualitt@google.com

Review URL: https://codereview.chromium.org/654313002
diff --git a/src/gpu/effects/GrTextureDomain.cpp b/src/gpu/effects/GrTextureDomain.cpp
index 647aed4..2a0cd20 100644
--- a/src/gpu/effects/GrTextureDomain.cpp
+++ b/src/gpu/effects/GrTextureDomain.cpp
@@ -265,8 +265,7 @@
 
 bool GrTextureDomainEffect::onIsEqual(const GrFragmentProcessor& sBase) const {
     const GrTextureDomainEffect& s = sBase.cast<GrTextureDomainEffect>();
-    return this->hasSameTextureParamsMatrixAndSourceCoords(s) &&
-           this->fTextureDomain == s.fTextureDomain;
+    return this->fTextureDomain == s.fTextureDomain;
 }
 
 void GrTextureDomainEffect::onComputeInvariantOutput(InvariantOutput* inout) const {