Remove ActiveDOMCallback

third_party/WebKit/Source/bindings/core/v8/V8IntersectionObserverCallback.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 "bindings/core/v8/V8IntersectionObserverCallback.h"
 
 #include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8IntersectionObserver.h"
 #include "bindings/core/v8/V8PrivateProperty.h"
 #include "core/dom/ExecutionContext.h"
 #include "wtf/Assertions.h"
 
 namespace blink {
 
 V8IntersectionObserverCallback::V8IntersectionObserverCallback(
     v8::Local<v8::Function> callback,
     v8::Local<v8::Object> owner,
     ScriptState* scriptState)
-    : ActiveDOMCallback(scriptState->getExecutionContext()),
-      m_callback(scriptState->isolate(), callback),
-      m_scriptState(scriptState) {
+    : m_callback(scriptState->isolate(), callback), m_scriptState(scriptState) {
   V8PrivateProperty::getIntersectionObserverCallback(scriptState->isolate())
       .set(scriptState->context(), owner, callback);
   m_callback.setPhantom();
 }
 
 V8IntersectionObserverCallback::~V8IntersectionObserverCallback() {}
 
 void V8IntersectionObserverCallback::handleEvent(
     const HeapVector<Member<IntersectionObserverEntry>>& entries,
     IntersectionObserver& observer) {
-  if (!canInvokeCallback())
+  ExecutionContext* executionContext = m_scriptState->getExecutionContext();
+  if (!executionContext || executionContext->isContextSuspended() ||
+      executionContext->isContextDestroyed())
     return;
-
   if (!m_scriptState->contextIsValid())
     return;
   ScriptState::Scope scope(m_scriptState.get());
 
   if (m_callback.isEmpty())
     return;
   v8::Local<v8::Value> observerHandle = toV8(
       &observer, m_scriptState->context()->Global(), m_scriptState->isolate());
   if (!observerHandle->IsObject())
     return;
 
   v8::Local<v8::Object> thisObject =
       v8::Local<v8::Object>::Cast(observerHandle);
   v8::Local<v8::Value> entriesHandle = toV8(
       entries, m_scriptState->context()->Global(), m_scriptState->isolate());
   if (entriesHandle.IsEmpty()) {
     return;
   }
   v8::Local<v8::Value> argv[] = {entriesHandle, observerHandle};
 
   v8::TryCatch exceptionCatcher(m_scriptState->isolate());
   exceptionCatcher.SetVerbose(true);
   V8ScriptRunner::callFunction(m_callback.newLocal(m_scriptState->isolate()),
                                m_scriptState->getExecutionContext(), thisObject,
                                2, argv, m_scriptState->isolate());
 }
 
 DEFINE_TRACE(V8IntersectionObserverCallback) {
   IntersectionObserverCallback::trace(visitor);
-  ActiveDOMCallback::trace(visitor);
 }
 
 }  // namespace blink