Move DstCoordTexture to GrXP, rename and remove the word "copy" from dstcopytexture names.

src/gpu/effects/GrCoverageSetOpXP.cpp

Index: src/gpu/effects/GrCoverageSetOpXP.cpp
diff --git a/src/gpu/effects/GrCoverageSetOpXP.cpp b/src/gpu/effects/GrCoverageSetOpXP.cpp
index 02552b3bae8c7788a6c1b26a6304ee104e7141e5..5c20f3486392e46b24f1ade0ccc4e164ba2f374b 100644
--- a/src/gpu/effects/GrCoverageSetOpXP.cpp
+++ b/src/gpu/effects/GrCoverageSetOpXP.cpp
@@ -226,7 +226,8 @@ GrXferProcessor*
 GrCoverageSetOpXPFactory::onCreateXferProcessor(const GrDrawTargetCaps& caps,
                                                 const GrProcOptInfo& colorPOI,
                                                 const GrProcOptInfo& covPOI,
-                                                const GrDeviceCoordTexture* dstCopy) const {
+                                                const DstTexture* dst) const {
+    SkASSERT(!dst);
     return CoverageSetOpXP::Create(fRegionOp, fInvertCoverage);
 }