Move DevToolsNetLogObserver to c/b/loader and create stub of network service interface

content/browser/devtools/devtools_manager.cc

 // 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.
 
 #include "content/browser/devtools/devtools_manager.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
-#include "content/browser/devtools/devtools_agent_host_impl.h"
-#include "content/browser/devtools/devtools_netlog_observer.h"
+#include "content/browser/loader/network_service_interface.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 
 namespace content {
 
 // static
 DevToolsManager* DevToolsManager::GetInstance() {
   return base::Singleton<DevToolsManager>::get();
 }
 
 DevToolsManager::DevToolsManager()
     : delegate_(GetContentClient()->browser()->GetDevToolsManagerDelegate()),
       attached_hosts_count_(0) {
 }
 
 DevToolsManager::~DevToolsManager() {
   DCHECK(!attached_hosts_count_);
 }
 
 void DevToolsManager::AgentHostStateChanged(
     DevToolsAgentHostImpl* agent_host, bool attached) {
   if (attached) {
-    if (!attached_hosts_count_) {
-      BrowserThread::PostTask(
-          BrowserThread::IO,
-          FROM_HERE,
-          base::Bind(&DevToolsNetLogObserver::Attach));
-    }
+    if (!attached_hosts_count_)
+      NetworkServiceInterface::GetInstance()->EnableNetLogObserver();
     ++attached_hosts_count_;
   } else {
     --attached_hosts_count_;
-    if (!attached_hosts_count_) {
-      BrowserThread::PostTask(
-          BrowserThread::IO,
-          FROM_HERE,
-          base::Bind(&DevToolsNetLogObserver::Detach));
-    }
+    if (!attached_hosts_count_)
+      NetworkServiceInterface::GetInstance()->DisableNetLogObserver();
   }
 }
 
 }  // namespace content