fix: fix mem leaks caused by event dispatch.

Author: andycall

bridge/core/dart_isolate_context.h

@@ -32,6 +32,9 @@ class PageGroup {
 
 struct DartWireContext {
   ScriptValue jsObject;
+  bool is_dedicated;
+  double context_id;
+  multi_threading::Dispatcher* dispatcher;
 };
 
 void InitializeBuiltInStrings(JSContext* ctx);

bridge/core/dom/events/event_target.cc

@@ -387,12 +387,21 @@ NativeValue EventTarget::HandleDispatchEventFromDart(int32_t argc, const NativeV
 
   auto* wire = new DartWireContext();
   wire->jsObject = event->ToValue();
+  wire->is_dedicated = GetExecutingContext()->isDedicated();
+  wire->context_id = GetExecutingContext()->contextId();
+  wire->dispatcher = GetDispatcher();
 
   auto dart_object_finalize_callback = [](void* isolate_callback_data, void* peer) {
     auto* wire = (DartWireContext*)(peer);
-    if (IsDartWireAlive(wire)) {
-      DeleteDartWire(wire);
-    }
+
+    wire->dispatcher->PostToJs(
+        wire->is_dedicated, wire->context_id,
+        [](DartWireContext* wire) -> void {
+          if (IsDartWireAlive(wire)) {
+            DeleteDartWire(wire);
+          }
+        },
+        wire);
   };
 
   WatchDartWire(wire);