Provide record time allocator to onCombineIfPossible()

Change-Id: I3acf5d5fdb29bfbd3407a8065b7567dff43503a0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259427
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/ops/GrRegionOp.cpp b/src/gpu/ops/GrRegionOp.cpp
index e12a865..80c4dfd 100644
--- a/src/gpu/ops/GrRegionOp.cpp
+++ b/src/gpu/ops/GrRegionOp.cpp
@@ -141,7 +141,7 @@
         flushState->executeDrawsAndUploadsForMeshDrawOp(this, chainBounds, pipeline);
     }
 
-    CombineResult onCombineIfPossible(GrOp* t, const GrCaps& caps) override {
+    CombineResult onCombineIfPossible(GrOp* t, SkArenaAlloc*, const GrCaps& caps) override {
         RegionOp* that = t->cast<RegionOp>();
         if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) {
             return CombineResult::kCannotCombine;