De-client TestRequestTracker

services/test_service/test_request_tracker.mojom

Index: services/test_service/test_request_tracker.mojom
diff --git a/services/test_service/test_request_tracker.mojom b/services/test_service/test_request_tracker.mojom
index 862bb7fbeb8402b861f5896ddb849adf86f310e0..91f8a2d444b72719b9dfdb5cb912850cafca277e 100644
--- a/services/test_service/test_request_tracker.mojom
+++ b/services/test_service/test_request_tracker.mojom
@@ -27,15 +27,8 @@ interface TestTrackedRequestService {
 
 // TestRequestTracker records ServiceStats for an individual service
 // connection for aggregation in a TestTrackedRequestService.
-[Client=TestRequestTrackerClient]
 interface TestRequestTracker {
+  SetNameAndReturnId(string service_name) => (uint64 id);
   // Upload a ServiceStats for tracking.
   RecordStats(uint64 client_id, ServiceStats? stats);
 };
-
-// The client-side contract for uploading ServiceStats to TestRequestTracker.
-interface TestRequestTrackerClient {
-  const uint64 kInvalidId = 0;
-  // Handshake to tell the client its global identifier and get the name.
-  SetIdAndReturnName(uint64 id) => (string? service_name);
-};