[Re-land] Add network throttling as enterprise policy

chromeos/network/shill_property_handler.h

Index: chromeos/network/shill_property_handler.h
diff --git a/chromeos/network/shill_property_handler.h b/chromeos/network/shill_property_handler.h
index fd299b533185b3c12942225a5c9f05f949eed045..a5146342befb4a69e1358cc27c95964f92f0d5db 100644
--- a/chromeos/network/shill_property_handler.h
+++ b/chromeos/network/shill_property_handler.h
@@ -139,6 +139,14 @@ class CHROMEOS_EXPORT ShillPropertyHandler
   // only set it.
   void SetWakeOnLanEnabled(bool enabled);
 
+  // Calls shill to enable/disable network bandwidth throttling. If |enabled|
+  // is true, |upload_rate_kbits| and |download_rate_kbits| specify the rate
+  // in kbits/s to throttle to. If |enabled| is false, throttling is disabled
+  // and the rates are ignored.
+  void SetNetworkThrottlingStatus(bool enabled,
+                                  uint32_t upload_rate_kbits,
+                                  uint32_t download_rate_kbits);
+
   // Requests an immediate network scan.
   void RequestScan() const;