Signal no pending activity in destructed contexts.

third_party/WebKit/Source/modules/imagecapture/ImageCapture.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/imagecapture/ImageCapture.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
@@ skipping 69 matching lines @@
 
 const AtomicString& ImageCapture::interfaceName() const {
   return EventTargetNames::ImageCapture;
 }
 
 ExecutionContext* ImageCapture::getExecutionContext() const {
   return ContextLifecycleObserver::getExecutionContext();
 }
 
 bool ImageCapture::hasPendingActivity() const {
-  return hasEventListeners();
+  return getExecutionContext() && hasEventListeners();
 }
 
 void ImageCapture::contextDestroyed() {
   removeAllEventListeners();
   m_serviceRequests.clear();
   DCHECK(!hasEventListeners());
 }
 
 ScriptPromise ImageCapture::getPhotoCapabilities(
     ScriptState* scriptState,
@@ skipping 282 matching lines @@
 }
 
 DEFINE_TRACE(ImageCapture) {
   visitor->trace(m_streamTrack);
   visitor->trace(m_serviceRequests);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink