Sync device management proto changes from the server side

This CL syncs the server-side changes (http://cl/214625862) and also
updates the list of error codes.

Bug: none
Change-Id: I86ea8d9ad0cb0d29004e552194e14c8217a76b22
Reviewed-on: https://chromium-review.googlesource.com/1251083
Commit-Queue: Alexander Hendrich <hendrich@chromium.org>
Reviewed-by: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595403}

components/policy/proto/device_management_backend.proto

@@ -1987,9 +1987,14 @@ message DeviceManagementRequest {
 // 200 OK: valid response is returned to client.
 // 400 Bad Request: invalid argument.
 // 401 Unauthorized: invalid auth cookie or DM token.
+// 402 Missing licenses.
 // 403 Forbidden: device management is not allowed.
 // 404 Not Found: the request URL is invalid.
+// 405 Invalid serial number.
+// 409 Device id conflict.
 // 410 Device Not Found: the device id is not found.
+// 412 Pending approval.
+// 417 Consumer account with packaged license.
 // 491 Request Pending: the request is pending approval.
 // 500 Internal Server Error: most likely a bug in DM server.
 // 503 Service Unavailable: most likely a backend error.
@@ -1997,36 +2002,7 @@ message DeviceManagementRequest {
 // 903 Deprovisioned: the device has been deprovisioned.
 // 904 Arc Disabled: ARC is not enabled on the domain.
 message DeviceManagementResponse {
-  reserved 24;
-
-  // TODO(hong): move error handling to HTTP level.
-  // Error code to client.
-  enum ErrorCode {
-    SUCCESS = 0;
-    // Returned for register request when device management is not supported
-    // for the domain.
-    DEVICE_MANAGEMENT_NOT_SUPPORTED = 1;
-    // Returned when the device is not found.
-    DEVICE_NOT_FOUND  = 2;
-    // Returned when passed in device management token doesn't match the token
-    // on server side.
-    DEVICE_MANAGEMENT_TOKEN_INVALID  = 3;
-    // Returned when device registration is pending approval (if required).
-    ACTIVATION_PENDING = 4;
-    // Returned when the policy is not found.
-    POLICY_NOT_FOUND  = 5;
-  }
-
-  // Error code for this response.
-  //
-  // For responses to TT clients, this field MUST be set, since it WAS
-  // a required field.  For special error code listed above, we return
-  // 200 in HTTP Status Code and set the real error code here.
-  //
-  // For release clients, we plan to move all error code to HTTP
-  // Status Code, so it is much easier for log analysis.  If possible,
-  // we plan to remove this field once Chrome OS TT phase is over.
-  optional ErrorCode error = 1 [default = SUCCESS];
+  reserved 1, 24;
 
   // Error message.
   optional string error_message = 2;