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

chromecast/browser/devtools/remote_debugging_server.cc

 // 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.
 
 #include "chromecast/browser/devtools/remote_debugging_server.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 130 matching lines @@
     return;
   }
 
   if (devtools_http_handler_) {
     LOG(INFO) << "Stop old devtools: port=" << port_;
     devtools_http_handler_.reset();
   }
 
   port_ = new_port;
   if (port_ > 0) {
-    manager_delegate_.reset(new CastDevToolsManagerDelegate());
     devtools_http_handler_.reset(new DevToolsHttpHandler(
         CreateSocketFactory(port_),
         GetFrontendUrl(),
         new CastDevToolsDelegate(),
-        manager_delegate_.get(),
         base::FilePath(),
         base::FilePath(),
         std::string(),
         GetUserAgent()));
     LOG(INFO) << "Devtools started: port=" << port_;
   }
 }
 
 }  // namespace shell
 }  // namespace chromecast