DevTools: tell agent it has client attached early (prior to the navigation).

chrome/browser/debugger/devtools_manager.h

 // Copyright (c) 2009 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 CHROME_BROWSER_DEBUGGER_DEVTOOLS_MANAGER_H_
 #define CHROME_BROWSER_DEBUGGER_DEVTOOLS_MANAGER_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 35 matching lines @@
   void ForwardToDevToolsClient(const RenderViewHost& from,
                                const IPC::Message& message);
 
   void OpenDevToolsWindow(WebContents* wc);
 
   // Starts element inspection in the devtools client.
   // Creates one by means of OpenDevToolsWindow if no client
   // exists.
   void InspectElement(WebContents* web_contents, int x, int y);
 
- private:
+  // Sends 'Attach' message to the agent using |target_host| in case
+  // there is a DevToolsClientHost registered for the |web_contents|.
+  void SendAttachToAgent(
+      const WebContents& web_contents,
+      RenderViewHost* target_host);
+
+private:
   // NotificationObserver override.
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // DevToolsClientHost::CloseListener override.
   // This method will remove all references from the manager to the
   // DevToolsClientHost and unregister all listeners related to the
   // DevToolsClientHost.
   virtual void ClientHostClosing(DevToolsClientHost* host);
 
   // Returns NavigationController for the tab that is inspected by devtools
   // client hosted by DevToolsClientHost.
   NavigationController* GetDevToolsAgentNavigationController(
       const DevToolsClientHost& client_host);
 
   void UnregisterDevToolsClientHost(
       DevToolsClientHost* client_host,
       NavigationController* navigation_controller);
   void StartListening(NavigationController* navigation_controller);
   void StopListening(NavigationController* navigation_controller);
-  void SendAttachToAgent(const WebContents& web_contents);
   void SendDetachToAgent(const WebContents& web_contents);
 
   // This object is not NULL iff there is at least one registered
   // DevToolsClientHost.
   scoped_ptr<NotificationRegistrar> web_contents_listeners_;
 
   // These two maps are for tracking dependencies between inspected tabs and
   // their DevToolsClientHosts. They are usful for routing devtools messages
   // and allow us to have at most one devtools client host per tab. We use
   // NavigationController* as key because it survives crosee-site navigation in
   // cases when tab contents may change.
   //
   // DevToolsManager start listening to DevToolsClientHosts when they are put
   // into these maps and removes them when they are closing.
   typedef std::map<const NavigationController*,
                    DevToolsClientHost*> ClientHostMap;
   ClientHostMap navcontroller_to_client_host_;
 
   typedef std::map<const DevToolsClientHost*,
                    NavigationController*> NavControllerMap;
   NavControllerMap client_host_to_navcontroller_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsManager);
 };
 
 #endif  // CHROME_BROWSER_DEBUGGER_DEVTOOLS_MANAGER_H_