Worklet: Separate Worklet into MainThreadWorklet and ThreadedWorklet

third_party/WebKit/Source/modules/csspaint/PaintWorklet.cpp

Index: third_party/WebKit/Source/modules/csspaint/PaintWorklet.cpp
diff --git a/third_party/WebKit/Source/modules/csspaint/PaintWorklet.cpp b/third_party/WebKit/Source/modules/csspaint/PaintWorklet.cpp
index 71c5f98b9a1b91107b3d5c6c05f09bcbb6f21a97..56cb7106e2bf0529d3f1d8d4b5564e199da0d5f0 100644
--- a/third_party/WebKit/Source/modules/csspaint/PaintWorklet.cpp
+++ b/third_party/WebKit/Source/modules/csspaint/PaintWorklet.cpp
@@ -17,7 +17,7 @@ PaintWorklet* PaintWorklet::Create(LocalFrame* frame) {
 }
 
 PaintWorklet::PaintWorklet(LocalFrame* frame)
-    : Worklet(frame),
+    : MainThreadWorklet(frame),
       paint_worklet_global_scope_(PaintWorkletGlobalScope::Create(
           frame,
           frame->GetDocument()->Url(),
@@ -42,7 +42,7 @@ void PaintWorklet::AddPendingGenerator(const String& name,
 
 DEFINE_TRACE(PaintWorklet) {
   visitor->Trace(paint_worklet_global_scope_);
-  Worklet::Trace(visitor);
+  MainThreadWorklet::Trace(visitor);
 }
 
 }  // namespace blink