Use wrapper tracing for worklets.

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

Index: third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp
diff --git a/third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp b/third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp
index 7a6adbb497619999f9a7fc5cf5d095b1d48ca753..2765bde1e2c156fefa9edcbde3f4d982edf3ad4a 100644
--- a/third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp
+++ b/third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp
@@ -55,8 +55,9 @@ CSSPaintDefinition::CSSPaintDefinition(
     Vector<CSSSyntaxDescriptor>& input_argument_types,
     bool has_alpha)
     : script_state_(script_state),
-      constructor_(script_state->GetIsolate(), constructor),
-      paint_(script_state->GetIsolate(), paint),
+      constructor_(script_state->GetIsolate(), this, constructor),
+      paint_(script_state->GetIsolate(), this, paint),
+      instance_(this),
       did_call_constructor_(false),
       has_alpha_(has_alpha) {
   native_invalidation_properties_.swap(native_invalidation_properties);
@@ -145,4 +146,10 @@ void CSSPaintDefinition::MaybeCreatePaintInstance() {
   did_call_constructor_ = true;
 }
 
+DEFINE_TRACE_WRAPPERS(CSSPaintDefinition) {
+  visitor->TraceWrappers(constructor_.Cast<v8::Value>());
+  visitor->TraceWrappers(paint_.Cast<v8::Value>());
+  visitor->TraceWrappers(instance_.Cast<v8::Value>());
+}
+
 }  // namespace blink