Revert 105659 - Delay network requests on startup if any webRequest or webNavigation extensions a...

chrome/browser/extensions/network_delay_listener.h

Index: chrome/browser/extensions/network_delay_listener.h
===================================================================
--- chrome/browser/extensions/network_delay_listener.h	(revision 105660)
+++ chrome/browser/extensions/network_delay_listener.h	(working copy)
@@ -1,103 +0,0 @@
-// Copyright (c) 2011 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_EXTENSIONS_NETWORK_DELAY_LISTENER_H_
-#define CHROME_BROWSER_EXTENSIONS_NETWORK_DELAY_LISTENER_H_
-#pragma once
-
-#include <map>
-#include <set>
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/perftimer.h"
-#include "base/time.h"
-#include "content/browser/renderer_host/resource_queue.h"
-#include "content/common/notification_observer.h"
-#include "content/common/notification_registrar.h"
-
-namespace net {
-class URLRequest;
-}  // namespace net
-
-struct GlobalRequestID;
-
-// This class handles delaying of resource loads that depend on unloaded
-// extensions. For each request that comes in, we check if all extensions are
-// ready for it to be loaded; if not, we delay the request.
-//
-// This class lives mostly on the IO thread. It listens on the UI thread for
-// updates to loaded extensions.  It will delete itself on the UI thread after
-// WillShutdownResourceQueue is called (on the IO thread).
-class NetworkDelayListener
-    : public base::RefCountedThreadSafe<NetworkDelayListener>,
-      public ResourceQueueDelegate,
-      public NotificationObserver {
- public:
-  NetworkDelayListener();
-
- private:
-  // ResourceQueueDelegate:
-  virtual void Initialize(ResourceQueue* resource_queue) OVERRIDE;
-  virtual bool ShouldDelayRequest(
-      net::URLRequest* request,
-      const ResourceDispatcherHostRequestInfo& request_info,
-      const GlobalRequestID& request_id) OVERRIDE;
-  virtual void WillShutdownResourceQueue() OVERRIDE;
-
-  friend class base::RefCountedThreadSafe<NetworkDelayListener>;
-
-  virtual ~NetworkDelayListener();
-
-  // Called when an extension that wants to delay network requests is loading.
-  void OnExtensionPending(const std::string& id);
-
-  // Called when an extension that wants to delay network requests is ready.
-  void OnExtensionReady(const std::string& id);
-
-  // If there are no more extensions pending, tell the network queue to resume
-  // processing requests.
-  void StartDelayedRequestsIfReady();
-
-  // Cleanup on UI thread.
-  void Cleanup();
-
-  ResourceQueue* resource_queue_;
-
-  // TODO(mpcomplete, pamg): the rest of this stuff should really be
-  // per-profile, but the complexity doesn't seem worth it at this point.
-
-  // True if the extensions are ready for network requests to proceed. In
-  // practice this means that the background pages of any pending extensions
-  // have been run.
-  bool extensions_ready_;
-
-  // Which extension IDs have registered to delay network requests on startup,
-  // but are not yet ready for them to resume.
-  std::set<std::string> pending_extensions_;
-
-  // Used to measure how long each extension has taken to become ready.
-  std::map<std::string, base::TimeTicks> delay_start_times_;
-
-  // Used to measure total time between the first delay request and resuming
-  // network requests.
-  PerfTimer overall_start_time_;
-
-  // Whether we've already calculated total startup time, so we don't corrupt
-  // the data with entries from installing or enabling single extensions.
-  bool recorded_startup_delay_;
-
-  // --- UI thread:
-
-  // NotificationObserver
-  virtual void Observe(int type,
-                       const NotificationSource& source,
-                       const NotificationDetails& details) OVERRIDE;
-
-  NotificationRegistrar registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkDelayListener);
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_NETWORK_DELAY_LISTENER_H_