Revert of Add network throttling as an enterprise policy

chrome/browser/chromeos/net/network_throttling_observer.cc

-// Copyright 2016 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 "chrome/browser/chromeos/net/network_throttling_observer.h"
-
-#include <memory>
-#include <string>
-
-#include "base/macros.h"
-#include "base/memory/ptr_util.h"
-#include "base/sys_info.h"
-#include "base/values.h"
-#include "chrome/common/pref_names.h"
-#include "chromeos/network/network_state_handler.h"
-#include "components/prefs/pref_member.h"
-#include "components/prefs/pref_registry_simple.h"
-#include "components/prefs/pref_service.h"
-
-namespace chromeos {
-
-NetworkThrottlingObserver::NetworkThrottlingObserver(PrefService* local_state)
-    : local_state_(local_state) {
-  pref_change_registrar_.Init(local_state_);
-
-  base::Callback<void(const std::string&)> throttle_callback = base::Bind(
-      &NetworkThrottlingObserver::OnPreferenceChanged, base::Unretained(this));
-
-  pref_change_registrar_.Add(prefs::kNetworkThrottlingEnabled,
-                             throttle_callback);
-}
-
-NetworkThrottlingObserver::~NetworkThrottlingObserver() {}
-
-void NetworkThrottlingObserver::RegisterPrefs(PrefRegistrySimple* registry) {
-  registry->RegisterDictionaryPref(prefs::kNetworkThrottlingEnabled);
-}
-
-void NetworkThrottlingObserver::OnPreferenceChanged(
-    const std::string& pref_name) {
-  DCHECK(pref_name == prefs::kNetworkThrottlingEnabled);
-
-  const base::DictionaryValue* throttling_policy =
-      local_state_->GetDictionary(prefs::kNetworkThrottlingEnabled);
-
-  // Default is to disable throttling if the policy is not found.
-  bool enabled = false;
-  uint32_t upload_rate = 0, download_rate = 0;
-  if (throttling_policy) {
-    int upload_rate_read, download_rate_read;
-
-    throttling_policy->GetBoolean("enabled", &enabled);
-
-    if (throttling_policy->GetInteger("upload_rate_kbits", &upload_rate_read) &&
-        upload_rate_read > 0) {
-      upload_rate = upload_rate_read;
-    }
-
-    if (throttling_policy->GetInteger("download_rate_kbits",
-                                      &download_rate_read) &&
-        download_rate_read > 0) {
-      download_rate = download_rate_read;
-    }
-  }
-  NetworkHandler::Get()->network_state_handler()->SetNetworkThrottlingStatus(
-      enabled, upload_rate, download_rate);
-}
-
-}  // namespace chromeos