Remove ContextLifecycleObserver from ActiveDOMCallback

third_party/WebKit/Source/bindings/core/v8/V8MutationCallback.h

 /*
  * Copyright (C) 2013 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:
  * 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 10 matching lines @@
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef V8MutationCallback_h
 #define V8MutationCallback_h
 
 #include "bindings/core/v8/ActiveDOMCallback.h"
 #include "bindings/core/v8/ScopedPersistent.h"
+#include "bindings/core/v8/ScriptState.h"
 #include "core/dom/MutationCallback.h"
 #include "wtf/RefPtr.h"
 #include <v8.h>
 
 namespace blink {
 
 class ExecutionContext;
-class ScriptState;
 
 class V8MutationCallback final : public MutationCallback,
                                  public ActiveDOMCallback {
   USING_GARBAGE_COLLECTED_MIXIN(V8MutationCallback);
 
  public:
   static V8MutationCallback* create(v8::Local<v8::Function> callback,
                                     v8::Local<v8::Object> owner,
                                     ScriptState* scriptState) {
     return new V8MutationCallback(callback, owner, scriptState);
   }
   ~V8MutationCallback() override;
 
   void call(const HeapVector<Member<MutationRecord>>&,
             MutationObserver*) override;
+
   ExecutionContext* getExecutionContext() const override {
-    return ContextLifecycleObserver::getExecutionContext();
+    return m_scriptState->getExecutionContext();
   }
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   V8MutationCallback(v8::Local<v8::Function>,
                      v8::Local<v8::Object>,
                      ScriptState*);
 
   ScopedPersistent<v8::Function> m_callback;
   RefPtr<ScriptState> m_scriptState;
 };
 
 }  // namespace blink
 
 #endif  // V8MutationCallback_h