Reland "Don't report promise rejection events during the microtask checkpoint"

third_party/WebKit/Source/bindings/core/v8/SharedPersistent.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 46 matching lines @@
     void setReference(const v8::Persistent<v8::Object>& parent, v8::Isolate* isolate)
     {
         m_value.setReference(parent, isolate);
     }
 
     bool operator==(const SharedPersistent<T>& other)
     {
         return m_value == other.m_value;
     }
 
+    template<typename P>
+    void setWeak(P* parameters, void (*callback)(const v8::WeakCallbackInfo<P>&), v8::WeakCallbackType type = v8::WeakCallbackType::kParameter)
+    {
+        m_value.setWeak(parameters, callback, type);
+    }
+
+    void clearWeak()
+    {
+        m_value.clearWeak();
+    }
+
 private:
     explicit SharedPersistent(v8::Local<T> value, v8::Isolate* isolate) : m_value(isolate, value) { }
     ScopedPersistent<T> m_value;
 };
 
 } // namespace blink
 
 #endif // SharedPersistent_h