[Re-land] Add network throttling as enterprise policy

chromeos/network/network_state_handler.h

 // Copyright (c) 2012 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 CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_H_
 #define CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 207 matching lines @@
   // Clears the last_error value for the NetworkState for |service_path|.
   void ClearLastErrorForNetwork(const std::string& service_path);
 
   // Sets the list of devices on which portal check is enabled.
   void SetCheckPortalList(const std::string& check_portal_list);
 
   // Sets the Manager.WakeOnLan property. Note: we do not track this state, we
   // only set it.
   void SetWakeOnLanEnabled(bool enabled);
 
+  // Enable or disable network bandwidth throttling, on all interfaces on the
+  // system. If |enabled| is true, |upload_rate_kbits| and |download_rate_kbits|
+  // are the desired rates (in kbits/s) to throttle to. If |enabled| is false,
+  // throttling is off, and the rates are ignored.
+  void SetNetworkThrottlingStatus(bool enabled,
+                                  uint32_t upload_rate_kbits,
+                                  uint32_t download_rate_kbits);
+
   const std::string& GetCheckPortalListForTest() const {
     return check_portal_list_;
   }
 
   // Returns the NetworkState of the EthernetEAP service, which contains the
   // EAP parameters used by the ethernet with |service_path|. If |service_path|
   // doesn't refer to an ethernet service or if the ethernet service is not
   // connected using EAP, returns NULL.
   const NetworkState* GetEAPForEthernet(const std::string& service_path);
 
@@ skipping 163 matching lines @@
 
   // Ensure that Shutdown() gets called exactly once.
   bool did_shutdown_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkStateHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_H_