ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/broadcastchannel/BroadcastChannel.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/broadcastchannel/BroadcastChannel.h"
 
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/events/EventQueue.h"
 #include "core/events/MessageEvent.h"
@@ skipping 107 matching lines @@
   DCHECK(success);
   ALLOW_UNUSED_LOCAL(success);
 }
 
 void BroadcastChannel::onError() {
   close();
 }
 
 BroadcastChannel::BroadcastChannel(ExecutionContext* executionContext,
                                    const String& name)
-    : ActiveScriptWrappable(this),
+    : ActiveScriptWrappable<BroadcastChannel>(this),
       ContextLifecycleObserver(executionContext),
       m_origin(executionContext->getSecurityOrigin()),
       m_name(name),
       m_binding(this) {
   mojom::blink::BroadcastChannelProviderPtr& provider =
       getThreadSpecificProvider();
 
   // Local BroadcastChannelClient for messages send from the browser to this
   // channel.
   mojom::blink::BroadcastChannelClientAssociatedPtrInfo localClientInfo;
@@ skipping 11 matching lines @@
       &remoteCientRequest);
   m_remoteClient.Bind(std::move(remoteClientInfo));
   m_remoteClient.set_connection_error_handler(convertToBaseCallback(
       WTF::bind(&BroadcastChannel::onError, wrapWeakPersistent(this))));
 
   provider->ConnectToChannel(m_origin, m_name, std::move(localClientInfo),
                              std::move(remoteCientRequest));
 }
 
 }  // namespace blink