src/chrome/browser/net/net_pref_observer.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/net/net_pref_observer.h"
   6
   7 #include "base/prefs/pref_service.h"
   8 #include "chrome/browser/chrome_notification_types.h"
   9 #include "chrome/browser/net/predictor.h"
  10 #include "chrome/browser/prerender/prerender_manager.h"
  11 #include "chrome/common/pref_names.h"
  12 #include "components/user_prefs/pref_registry_syncable.h"
  13 #include "content/public/browser/browser_thread.h"
  14 #include "net/http/http_stream_factory.h"
  15
  16 using content::BrowserThread;
  17
  18 NetPrefObserver::NetPrefObserver(PrefService* prefs,
  19                                  prerender::PrerenderManager* prerender_manager,
  20                                  chrome_browser_net::Predictor* predictor)
  21     : prerender_manager_(prerender_manager),
  22       predictor_(predictor) {
  23   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  24   DCHECK(prefs);
  25   DCHECK(predictor);
  26
  27   base::Closure prefs_callback = base::Bind(&NetPrefObserver::ApplySettings,
  28                                             base::Unretained(this));
  29   network_prediction_enabled_.Init(prefs::kNetworkPredictionEnabled, prefs,
  30                                    prefs_callback);
  31   spdy_disabled_.Init(prefs::kDisableSpdy, prefs, prefs_callback);
  32
  33   ApplySettings();
  34 }
  35
  36 NetPrefObserver::~NetPrefObserver() {
  37   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  38 }
  39
  40 void NetPrefObserver::ApplySettings() {
  41   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  42
  43   predictor_->EnablePredictor(*network_prediction_enabled_);
  44   if (prerender_manager_)
  45     prerender_manager_->set_enabled(*network_prediction_enabled_);
  46   if (spdy_disabled_.IsManaged())
  47     net::HttpStreamFactory::set_spdy_enabled(!*spdy_disabled_);
  48 }
  49
  50 // static
  51 void NetPrefObserver::RegisterProfilePrefs(
  52     user_prefs::PrefRegistrySyncable* registry) {
  53   registry->RegisterBooleanPref(
  54       prefs::kNetworkPredictionEnabled,
  55       true,
  56       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
  57   registry->RegisterBooleanPref(
  58       prefs::kDisableSpdy,
  59       false,
  60       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
  61 }