1) Add basic configuration (network connection, language, keyboard layout, timezone) setup page. 2)…

components/pairing/host_pairing_controller.h

Index: components/pairing/host_pairing_controller.h
diff --git a/components/pairing/host_pairing_controller.h b/components/pairing/host_pairing_controller.h
index b360d071fea3fef03e0b7ae4b48979ab3d4ba5e8..ab928241616ae7935b6a015603de25da8634783b 100644
--- a/components/pairing/host_pairing_controller.h
+++ b/components/pairing/host_pairing_controller.h
@@ -18,6 +18,8 @@ class HostPairingController {
     STAGE_INITIALIZATION_ERROR,
     STAGE_WAITING_FOR_CONTROLLER,
     STAGE_WAITING_FOR_CODE_CONFIRMATION,
+    STAGE_SETUP_BASIC_CONFIGURATION,
+    STAGE_SETUP_NETWOKR_ERROR,
     STAGE_WAITING_FOR_CONTROLLER_AFTER_UPDATE,
     STAGE_WAITING_FOR_CREDENTIALS,
     STAGE_ENROLLING,
@@ -71,6 +73,9 @@ class HostPairingController {
   // Returns current stage of pairing process.
   virtual Stage GetCurrentStage() = 0;
 
+  // Set current stage and notify its observers the stage has changed.
+  virtual void ChangeStage(Stage new_stage) = 0;

[dzhioev (left Google), 2015/12/15 23:07:23]

This method shouldn't be in a public interface. Changing the stage is a
responsibility of the controller. External code can only notify the controller
about events (e.g. network configuration failed, or update status changed) and
it's up to controller to decide which stage should go next.

+
   // Starts pairing process. Can be called only on |STAGE_NONE| stage.
   virtual void StartPairing() = 0;