Guard GrOp::dumpInfo with SK_DEBUG

This code was only called from debug code, but was still showing up in
Flutter's release build.

Bug: skia:
Change-Id: I0cba323fc3cb14cfe6daf2388cecf5cf317ac9fa
Reviewed-on: https://skia-review.googlesource.com/c/170268
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
diff --git a/src/gpu/ops/GrDefaultPathRenderer.cpp b/src/gpu/ops/GrDefaultPathRenderer.cpp
index c2e1d69..3e70847 100644
--- a/src/gpu/ops/GrDefaultPathRenderer.cpp
+++ b/src/gpu/ops/GrDefaultPathRenderer.cpp
@@ -361,6 +361,7 @@
         fHelper.visitProxies(func);
     }
 
+#ifdef SK_DEBUG
     SkString dumpInfo() const override {
         SkString string;
         string.appendf("Color: 0x%08x Count: %d\n", fColor.toBytes_RGBA(), fPaths.count());
@@ -371,6 +372,7 @@
         string += INHERITED::dumpInfo();
         return string;
     }
+#endif
 
     DefaultPathOp(const Helper::MakeArgs& helperArgs, const SkPMColor4f& color, const SkPath& path,
                   SkScalar tolerance, uint8_t coverage, const SkMatrix& viewMatrix, bool isHairline,