Fix a bug where the inspector would not keep event pages alive.

content/browser/debugger/worker_devtools_manager.cc

 // Copyright (c) 2011 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 "content/browser/debugger/worker_devtools_manager.h"
 
 #include <list>
 #include <map>
 
 #include "base/bind.h"
@@ skipping 135 matching lines @@
   // DevToolsAgentHost implementation.
   virtual void SendMessageToAgent(IPC::Message* message) OVERRIDE {
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::Bind(
             &WorkerDevToolsAgentHost::ForwardToWorkerDevToolsAgent,
             worker_id_.first,
             worker_id_.second,
             *message));
   }
+  virtual void NotifyClientOpening() OVERRIDE {}
   virtual void NotifyClientClosing() OVERRIDE {}
   virtual int GetRenderProcessId() OVERRIDE { return -1; }
 
   WorkerId worker_id_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkerDevToolsAgentHost);
 };
 
 
 class WorkerDevToolsManager::DetachedClientHosts {
@@ skipping 321 matching lines @@
     host->WorkerDestroyed();
 }
 
 // static
 void WorkerDevToolsManager::SendResumeToWorker(const WorkerId& id) {
   if (WorkerProcessHost* process = FindWorkerProcess(id.first))
     process->Send(new DevToolsAgentMsg_ResumeWorkerContext(id.second));
 }
 
 }  // namespace