Revert "Merge GrOpList and GrRTOpList and rename to GrOpsTask."

This reverts commit 2a5954140b49d18e5161a30a4ae2c7ac28bc1993.

Reason for revert: breaking everything

Original change's description:
> Merge GrOpList and GrRTOpList and rename to GrOpsTask.
> 
> Change-Id: I8f4f2218a30fd0541a8f79f7bb9850f9500cd243
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/236343
> Commit-Queue: Greg Daniel <egdaniel@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=egdaniel@google.com,bsalomon@google.com,robertphillips@google.com

Change-Id: I27840ea0343e8e6b388556afb7bd2e76386d611d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/236349
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/GrPathRenderer.h b/src/gpu/GrPathRenderer.h
index a1d0741..26f7c7f 100644
--- a/src/gpu/GrPathRenderer.h
+++ b/src/gpu/GrPathRenderer.h
@@ -28,7 +28,7 @@
 class SkPath;
 
 /**
- *  Base class for drawing paths into a GrOpsTask.
+ *  Base class for drawing paths into a GrOpList.
  */
 class GrPathRenderer : public SkRefCnt {
 public: