Cleanup: Remove WeakPtr usage in WebSharedWorkerImpl

public/web/WebSharedWorker.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 26 matching lines @@
 namespace blink {
 
 class WebString;
 class WebMessagePortChannel;
 class WebSharedWorkerClient;
 class WebURL;
 
 // This is the interface to a SharedWorker thread.
 class WebSharedWorker {
 public:
-    // Invoked from the worker thread to instantiate a WebSharedWorker that interacts with the WebKit worker components.
+    // Instantiate a WebSharedWorker that interacts with the shared worker.
+    // WebSharedWorkerClient given here must outlive or have the identical
+    // lifetime as this instance.
     BLINK_EXPORT static WebSharedWorker* create(WebSharedWorkerClient*);
 
     virtual void startWorkerContext(
         const WebURL& scriptURL,
         const WebString& name,
         const WebString& contentSecurityPolicy,
         WebContentSecurityPolicyType) = 0;
 
     // Sends a connect event to the SharedWorker context.
     virtual void connect(WebMessagePortChannel*) = 0;
 
-    // Invoked to shutdown the worker when there are no more associated documents.
+    // Invoked to shutdown the worker when there are no more associated documents. This eventually deletes this instance.
     virtual void terminateWorkerContext() = 0;
 
-    // Notification when the WebCommonWorkerClient is destroyed.
-    virtual void clientDestroyed() = 0;
-
     virtual void pauseWorkerContextOnStart() = 0;
     virtual void attachDevTools(const WebString& hostId) = 0;
     virtual void reattachDevTools(const WebString& hostId, const WebString& savedState) = 0;
     virtual void detachDevTools() = 0;
     virtual void dispatchDevToolsMessage(const WebString&) = 0;
 };
 
 } // namespace blink
 
 #endif