added support for PLS path rendering

BUG=skia:3555
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1541903002

Review URL: https://codereview.chromium.org/1541903002
diff --git a/src/gpu/GrPathProcessor.cpp b/src/gpu/GrPathProcessor.cpp
index f1faa7d..6ecad59 100644
--- a/src/gpu/GrPathProcessor.cpp
+++ b/src/gpu/GrPathProcessor.cpp
@@ -123,8 +123,7 @@
                                  const GrXPOverridesForBatch& overrides,
                                  const SkMatrix& viewMatrix,
                                  const SkMatrix& localMatrix)
-    : INHERITED(true)
-    , fColor(color)
+    : fColor(color)
     , fViewMatrix(viewMatrix)
     , fLocalMatrix(localMatrix)
     , fOverrides(overrides) {