Add support for MAC address randomization

chromeos/network/network_device_handler_impl.h

Index: chromeos/network/network_device_handler_impl.h
diff --git a/chromeos/network/network_device_handler_impl.h b/chromeos/network/network_device_handler_impl.h
index 31d88548c65671f128c745ee1bacfca18e882555..6020a23c5bad828159324d5544b61de4516670b9 100644
--- a/chromeos/network/network_device_handler_impl.h
+++ b/chromeos/network/network_device_handler_impl.h
@@ -89,6 +89,8 @@ class CHROMEOS_EXPORT NetworkDeviceHandlerImpl
 
   void SetCellularAllowRoaming(bool allow_roaming) override;
 
+  void SetMACAddressRandomizationEnabled(bool enabled) override;
+
   void SetWifiTDLSEnabled(
       const std::string& ip_or_mac_address,
       bool enabled,
@@ -129,12 +131,16 @@ class CHROMEOS_EXPORT NetworkDeviceHandlerImpl
   // cellular devices of Shill.
   void ApplyCellularAllowRoamingToShill();
 
+  // Apply the current value of |mac_addr_randomization_| to wifi devices.
+  void ApplyMACAddressRandomizationToShill();
+
   // Get the DeviceState for the wifi device, if any.
   const DeviceState* GetWifiDeviceState(
       const network_handler::ErrorCallback& error_callback);
 
   NetworkStateHandler* network_state_handler_;
   bool cellular_allow_roaming_;
+  bool mac_addr_randomization_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkDeviceHandlerImpl);
 };