Clean up obsolete client-side multi-device allocation diagnostics.

src/devtools/mobileharness/shared/labinfo/proto/lab_info_service.proto

@@ -26,6 +26,9 @@ option java_outer_classname = "LabInfoServiceProto";
 service LabInfoService {
   // Gets lab and device information.
   rpc GetLabInfo(GetLabInfoRequest) returns (GetLabInfoResponse);
+
+  // Diagnoses job allocation failure.
+  rpc DiagnoseJob(DiagnoseJobRequest) returns (DiagnoseJobResponse) {}
 }
 
 message GetLabInfoRequest {
@@ -45,3 +48,21 @@ message GetLabInfoResponse {
   // Required.
   mobileharness.api.query.LabQueryResult lab_query_result = 1;
 }
+
+message DiagnoseJobRequest {
+  // Required. The ID of the job to diagnose.
+  string job_id = 1;
+}
+
+message DiagnoseJobResponse {
+  // Required. The human-readable diagnostic report.
+  string readable_report = 1;
+
+  enum ErrorType {
+    UNKNOWN = 0;
+    INFRA_ERROR = 1;
+    USER_CONFIG_ERROR = 2;
+  }
+  // Required. The error type of the allocation failure.
+  ErrorType error_type = 2;
+}

src/java/com/google/devtools/mobileharness/api/model/error/InfraErrorId.java

@@ -229,14 +229,14 @@ public enum InfraErrorId implements ErrorId {
   MASTER_RPC_STUB_LAB_SYNC_REMOVE_MISSING_DEVICES_ERROR(49_291, ErrorType.INFRA_ISSUE),
 
   MASTER_RPC_STUB_LAB_INFO_GET_LAB_INFO_ERROR(49_260, ErrorType.INFRA_ISSUE),
-
   MASTER_RPC_STUB_LAB_INFO_GET_LAB_METADATAS_ERROR(49_261, ErrorType.INFRA_ISSUE),
   MASTER_RPC_STUB_LAB_INFO_GET_LAB_OVERVIEWS_ERROR(49_262, ErrorType.INFRA_ISSUE),
   MASTER_RPC_STUB_LAB_INFO_GET_LAB_SUMMARIES_ERROR(49_263, ErrorType.INFRA_ISSUE),
   MASTER_RPC_STUB_LAB_INFO_GET_LAB_DETAIL_ERROR(49_264, ErrorType.INFRA_ISSUE),
   MASTER_RPC_STUB_LAB_INFO_GET_DEVICE_DETAIL_ERROR(49_265, ErrorType.INFRA_ISSUE),
   MASTER_RPC_STUB_LAB_INFO_GET_DEVICE_DIMENSIONS_ERROR(49_266, ErrorType.INFRA_ISSUE),
   MASTER_RPC_STUB_LAB_INFO_GET_COMPRESSED_DEVICE_METADATAS_ERROR(49_267, ErrorType.INFRA_ISSUE),
+  MASTER_RPC_STUB_LAB_INFO_DIAGNOSE_JOB_ERROR(49_268, ErrorType.INFRA_ISSUE),
 
   MASTER_RPC_STUB_JOB_INFO_GET_JOB_SUMMARY_LIST_ERROR(49_271, ErrorType.INFRA_ISSUE),
   MASTER_RPC_STUB_JOB_INFO_GET_JOB_DETAIL_ERROR(49_272, ErrorType.INFRA_ISSUE),