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

content/browser/debugger/render_view_devtools_agent_host.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_DEBUGGER_RENDER_VIEW_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_BROWSER_DEBUGGER_RENDER_VIEW_DEVTOOLS_AGENT_HOST_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 10 matching lines @@
     : public DevToolsAgentHost,
       private content::RenderViewHostObserver {
  public:
   RenderViewDevToolsAgentHost(RenderViewHost*);
 
  private:
   virtual ~RenderViewDevToolsAgentHost();
 
   // DevToolsAgentHost implementation.
   virtual void SendMessageToAgent(IPC::Message* msg) OVERRIDE;
+  virtual void NotifyClientOpening() OVERRIDE;
   virtual void NotifyClientClosing() OVERRIDE;
   virtual int GetRenderProcessId() OVERRIDE;
 
   // content::RenderViewHostObserver overrides.
   virtual void RenderViewHostDestroyed(RenderViewHost* rvh) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   void OnDispatchOnInspectorFrontend(const std::string& message);
   void OnSaveAgentRuntimeState(const std::string& state);
   void OnClearBrowserCache();
   void OnClearBrowserCookies();
 
   RenderViewHost* render_view_host_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewDevToolsAgentHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEBUGGER_RENDER_VIEW_DEVTOOLS_AGENT_HOST_H_