Cleanup: Remove WeakPtr usage in WebSharedWorkerImpl

public/web/WebSharedWorkerClient.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 30 matching lines @@
 class WebNotificationPresenter;
 class WebSecurityOrigin;
 class WebServiceWorkerNetworkProvider;
 class WebString;
 class WebWorker;
 class WebWorkerContentSettingsClientProxy;
 
 // Provides an interface back to the in-page script object for a worker.
 // All functions are expected to be called back on the thread that created
 // the Worker object, unless noted.
+// An instance of this class must outlive or must have the identical lifetime
+// as WebSharedWorker (i.e. must be kept alive until workerScriptLoadFailed()
+// or workerContextDestroyed() is called).
 class WebSharedWorkerClient {
 public:
     virtual void workerContextClosed() = 0;
     virtual void workerContextDestroyed() = 0;
     virtual void workerReadyForInspection() { }
     virtual void workerScriptLoaded() = 0;
     virtual void workerScriptLoadFailed() = 0;
     virtual void selectAppCacheID(long long) = 0;
 
     // Returns the notification presenter for this worker context. Pointer
@@ skipping 13 matching lines @@
     // Called on the main thread during initialization.
     // Ownership of the returned object is transferred to the caller.
     virtual WebServiceWorkerNetworkProvider* createServiceWorkerNetworkProvider(WebDataSource*) { return nullptr; }
 
     virtual void sendDevToolsMessage(int callId, const WebString& message, const WebString& state) { }
 };
 
 } // namespace blink
 
 #endif