[sync] Move remaining test code to components/sync/test/

Exact same considerations as in crrev.com/c/3822919. We leave a
components/sync/driver/mock_sync_service.h around including the new
components/sync/test/mock_sync_service.h because downstream code is
including the former. After migrating downstream, the old header
can be removed.

Bug: 948661
Change-Id: I8e7794dc031c56d7661f98fdb4af3b779ef5e1ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3825928
Quick-Run: Victor Vianna <[email protected]>
Auto-Submit: Victor Vianna <[email protected]>
Reviewed-by: Boris Sazonov <[email protected]>
Reviewed-by: Rohit Rao <[email protected]>
Commit-Queue: Victor Vianna <[email protected]>
Reviewed-by: Ken Rockot <[email protected]>
Reviewed-by: Marc Treib <[email protected]>
Reviewed-by: James Cook <[email protected]>
Reviewed-by: Matt Menke <[email protected]>
Reviewed-by: Ted Choc <[email protected]>
Commit-Queue: Boris Sazonov <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1041487}
diff --git a/chrome/browser/sharing/sharing_utils_unittest.cc b/chrome/browser/sharing/sharing_utils_unittest.cc
index 95ddf7fd..d50be57 100644
--- a/chrome/browser/sharing/sharing_utils_unittest.cc
+++ b/chrome/browser/sharing/sharing_utils_unittest.cc
@@ -9,9 +9,9 @@
 #include "chrome/browser/sharing/features.h"
 #include "chrome/browser/sharing/proto/sharing_message.pb.h"
 #include "chrome/browser/sharing/sharing_constants.h"
-#include "components/sync/driver/test_sync_service.h"
 #include "components/sync/protocol/device_info_specifics.pb.h"
 #include "components/sync/protocol/sync_enums.pb.h"
+#include "components/sync/test/test_sync_service.h"
 #include "components/sync_device_info/device_info.h"
 #include "testing/gtest/include/gtest/gtest.h"