[DevTools] Cleanup DevToolsTarget and DevToolsManagerDelegate after moving to devtools_discovery.

chromecast/browser/devtools/remote_debugging_server.h

 // Copyright 2014 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 CHROMECAST_BROWSER_DEVTOOLS_REMOTE_DEBUGGING_SERVER_H_
 #define CHROMECAST_BROWSER_DEVTOOLS_REMOTE_DEBUGGING_SERVER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_member.h"
 
@@ skipping 12 matching lines @@
   ~RemoteDebuggingServer();
 
  private:
   // Called on port number changed.
   void OnPortChanged();
 
   // Returns whether or not the remote debugging server should be available
   // on device startup.
   bool ShouldStartImmediately();
 
-  // TODO(dgozman): remove once devtools_discovery component is extracted.
-  scoped_ptr<CastDevToolsManagerDelegate> manager_delegate_;
   scoped_ptr<devtools_http_handler::DevToolsHttpHandler> devtools_http_handler_;
 
   IntegerPrefMember pref_port_;
   uint16 port_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteDebuggingServer);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_DEVTOOLS_REMOTE_DEBUGGING_SERVER_H_