[Re-land] Add network throttling as enterprise policy

chrome/browser/chromeos/policy/proto/chrome_device_policy.proto

 // Copyright 2013 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package enterprise_management;
 
@@ skipping 725 matching lines @@
   optional bool quirks_download_enabled = 1;
 }
 
 // A list of security origins for SAML login pages that are allowed to
 // access the webcam.  No login pages will be allowed to access the
 // webcam if the list is empty.
 message LoginVideoCaptureAllowedUrlsProto {
   repeated string urls = 1;
 }
 
+message NetworkThrottlingEnabledProto {
+  optional bool enabled = 1 [default = false];
+  optional int32 upload_rate_kbits = 2 [default = 0];
+  optional int32 download_rate_kbits = 3 [default = 0];
+}
+
 // A list of app-ids to install from the webstore on the login page.
 message LoginAppsProto {
   repeated string login_apps = 1;
 }
 
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
   optional GuestModeEnabledProto guest_mode_enabled = 3;
   optional OBSOLETE_DeviceProxySettingsProto device_proxy_settings = 4
@@ skipping 38 matching lines @@
   optional DisplayRotationDefaultProto display_rotation_default = 39;
   optional AllowKioskAppControlChromeVersionProto
       allow_kiosk_app_control_chrome_version = 40;
   optional LoginAuthenticationBehaviorProto login_authentication_behavior = 41;
   optional UsbDetachableWhitelistProto usb_detachable_whitelist = 42;
   optional AllowBluetoothProto allow_bluetooth = 43;
   optional DeviceQuirksDownloadEnabledProto quirks_download_enabled = 44;
   optional LoginVideoCaptureAllowedUrlsProto login_video_capture_allowed_urls =
       45;
   optional LoginAppsProto login_apps = 46;
+  optional NetworkThrottlingEnabledProto network_throttling = 47;
 }