Revert 24372 - Delay request loading until all user scripts that request depe...

chrome/browser/extensions/user_script_listener.h

Index: chrome/browser/extensions/user_script_listener.h
===================================================================
--- chrome/browser/extensions/user_script_listener.h	(revision 24418)
+++ chrome/browser/extensions/user_script_listener.h	(working copy)
@@ -1,90 +0,0 @@
-// 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_EXTENSIONS_USER_SCRIPT_LISTENER_H_
-#define CHROME_BROWSER_EXTENSIONS_USER_SCRIPT_LISTENER_H_
-
-#include <list>
-
-#include "base/ref_counted.h"
-#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
-#include "chrome/common/extensions/url_pattern.h"
-#include "chrome/common/notification_registrar.h"
-
-class Extension;
-class MessageLoop;
-class URLRequest;
-
-// This class handles delaying of resource loads that depend on unloaded user
-// scripts. For each request that comes in, we check if it depends on a user
-// script, and if so, whether that user script is ready; 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.
-class UserScriptListener
-    : public base::RefCountedThreadSafe<UserScriptListener>,
-      public NotificationObserver {
- public:
-  UserScriptListener(MessageLoop* ui_loop,
-                     MessageLoop* io_loop,
-                     ResourceDispatcherHost* rdh);
-
-  void OnResourceDispatcherHostGone() { resource_dispatcher_host_ = NULL; }
-
-  // Returns true if we're ready to service the request. Otherwise, if the
-  // request URL depends on any user scripts that haven't been loaded yet, we
-  // will delay the request until we're ready.
-  bool ShouldStartRequest(URLRequest* request);
-
- private:
-  typedef std::list<URLPattern> URLPatterns;
-
-  // Resume any requests that we delayed in order to wait for user scripts.
-  void StartDelayedRequests();
-
-  // Appends new url patterns to our list, also setting user_scripts_ready_
-  // to false.
-  void AppendNewURLPatterns(const URLPatterns& new_patterns);
-
-  // Replaces our url pattern list. This is only used when patterns have been
-  // deleted, so user_scripts_ready_ remains unchanged.
-  void ReplaceURLPatterns(const URLPatterns& patterns);
-
-  MessageLoop* ui_loop_;
-  MessageLoop* io_loop_;
-  ResourceDispatcherHost* resource_dispatcher_host_;
-
-  // A list of every request that we delayed. Will be flushed when user scripts
-  // are ready.
-  typedef std::list<ResourceDispatcherHost::GlobalRequestID> DelayedRequests;
-  DelayedRequests delayed_request_ids_;
-
-  // TODO(mpcomplete): the rest of this stuff should really be per-profile, but
-  // the complexity doesn't seem worth it at this point.
-
-  // True if the user scripts contained in |url_patterns_| are ready for
-  // injection.
-  bool user_scripts_ready_;
-
-  // A list of URL patterns that have will have user scripts applied to them.
-  URLPatterns url_patterns_;
-
-  // --- UI thread:
-
-  // Helper to collect the extension's user script URL patterns in a list and
-  // return it.
-  void CollectURLPatterns(Extension* extension, URLPatterns* patterns);
-
-  // NotificationObserver
-  virtual void Observe(NotificationType type,
-                       const NotificationSource& source,
-                       const NotificationDetails& details);
-
-  NotificationRegistrar registrar_;
-
-  DISALLOW_EVIL_CONSTRUCTORS(UserScriptListener);
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_USER_SCRIPT_LISTENER_H_