Implement onunhandledrejection / onrejectionhandled events

Source/core/workers/WorkerGlobalScope.h

 /*
  * Copyright (C) 2008, 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 79 matching lines @@
 
     void postTask(const WebTraceLocation&, PassOwnPtr<ExecutionContextTask>) override final; // Executes the task on context's thread asynchronously.
 
     // WorkerGlobalScope
     WorkerGlobalScope* self() { return this; }
     WorkerConsole* console();
     WorkerLocation* location() const;
     void close();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
+    DEFINE_ATTRIBUTE_EVENT_LISTENER(rejectionhandled);
+    DEFINE_ATTRIBUTE_EVENT_LISTENER(unhandledrejection);
 
     // WorkerUtils
     virtual void importScripts(const Vector<String>& urls, ExceptionState&);
     // Returns null if caching is not supported.
     virtual PassOwnPtr<CachedMetadataHandler> createWorkerScriptCachedMetadataHandler(const KURL& scriptURL, const Vector<char>* metaData) { return nullptr; }
 
     WorkerNavigator* navigator() const;
 
     // ScriptWrappable
     v8::Local<v8::Object> wrap(v8::Isolate*, v8::Local<v8::Object> creationContext) override final;
@@ skipping 88 matching lines @@
 
     unsigned long m_workerExceptionUniqueIdentifier;
     WillBeHeapHashMap<unsigned long, RefPtrWillBeMember<ConsoleMessage>> m_pendingMessages;
 };
 
 DEFINE_TYPE_CASTS(WorkerGlobalScope, ExecutionContext, context, context->isWorkerGlobalScope(), context.isWorkerGlobalScope());
 
 } // namespace blink
 
 #endif // WorkerGlobalScope_h