remove legacy filter-flags, and store FilterLevel directly

src/pipe/SkGPipeRead.cpp

Index: src/pipe/SkGPipeRead.cpp
diff --git a/src/pipe/SkGPipeRead.cpp b/src/pipe/SkGPipeRead.cpp
index aaa6b4c9c1d2762e4d20b9b9caf0a1476c265d78..f95bb7c40463ade677f035a4f4c33cb6b2101fc2 100644
--- a/src/pipe/SkGPipeRead.cpp
+++ b/src/pipe/SkGPipeRead.cpp
@@ -662,6 +662,7 @@ static void paintOp_rp(SkCanvas*, SkReader32* reader, uint32_t op32,
             case kReset_PaintOp: p->reset(); break;
             case kFlags_PaintOp: p->setFlags(data); break;
             case kColor_PaintOp: p->setColor(reader->readU32()); break;
+            case kFilterLevel_PaintOp: p->setFilterLevel((SkPaint::FilterLevel)data); break;
             case kStyle_PaintOp: p->setStyle((SkPaint::Style)data); break;
             case kJoin_PaintOp: p->setStrokeJoin((SkPaint::Join)data); break;
             case kCap_PaintOp: p->setStrokeCap((SkPaint::Cap)data); break;