Remove fColor from PathRenderer DrawPathArgs struct

This was getting in the way of other refactorings.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2126083002

Review-Url: https://codereview.chromium.org/2126083002
diff --git a/src/gpu/batches/GrTessellatingPathRenderer.cpp b/src/gpu/batches/GrTessellatingPathRenderer.cpp
index b17bf1a..992d773 100644
--- a/src/gpu/batches/GrTessellatingPathRenderer.cpp
+++ b/src/gpu/batches/GrTessellatingPathRenderer.cpp
@@ -271,7 +271,8 @@
     vmi.mapRect(&clipBounds);
     SkPath path;
     args.fShape->asPath(&path);
-    SkAutoTUnref<GrDrawBatch> batch(TessellatingPathBatch::Create(args.fColor, *args.fShape,
+    SkAutoTUnref<GrDrawBatch> batch(TessellatingPathBatch::Create(args.fPaint->getColor(),
+                                                                  *args.fShape,
                                                                   *args.fViewMatrix, clipBounds));
 
     GrPipelineBuilder pipelineBuilder(*args.fPaint, args.fDrawContext->mustUseHWAA(*args.fPaint));