Disambiguate LifecycleObserver::contextDestroyed

third_party/WebKit/Source/core/streams/UnderlyingSourceBase.h

 // 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.
 
 #ifndef UnderlyingSourceBase_h
 #define UnderlyingSourceBase_h
 
 #include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptState.h"
@@ skipping 28 matching lines @@
   ScriptPromise cancelWrapper(ScriptState*, ScriptValue reason);
   virtual ScriptPromise cancel(ScriptState*, ScriptValue reason);
 
   void notifyLockAcquired();
   void notifyLockReleased();
 
   // ScriptWrappable
   bool hasPendingActivity() const;
 
   // ContextLifecycleObserver
-  void contextDestroyed() override;
+  void contextDestroyed(ExecutionContext*) override;
 
  protected:
   explicit UnderlyingSourceBase(ScriptState* scriptState)
       : ContextLifecycleObserver(scriptState->getExecutionContext()) {}
 
   ReadableStreamController* controller() const { return m_controller; }
 
  private:
   Member<ReadableStreamController> m_controller;
   bool m_isStreamLocked = false;
 };
 
 }  // namespace blink
 
 #endif  // UnderlyingSourceBase_h