Task Scheduler API migration: change BrowserThreadModelWorker to SequencedModelWorker

components/sync/BUILD.gn

Index: components/sync/BUILD.gn
diff --git a/components/sync/BUILD.gn b/components/sync/BUILD.gn
index b75e7ff40ee3c750dfd3a7623bb80467c7bdbe60..6bd0d7f876ec9c951dc9248ab34cd7c3debc7b46 100644
--- a/components/sync/BUILD.gn
+++ b/components/sync/BUILD.gn
@@ -182,8 +182,6 @@ static_library("sync") {
     "engine/attachments/in_memory_attachment_store.h",
     "engine/attachments/on_disk_attachment_store.cc",
     "engine/attachments/on_disk_attachment_store.h",
-    "engine/browser_thread_model_worker.cc",
-    "engine/browser_thread_model_worker.h",
     "engine/commit_queue.cc",
     "engine/commit_queue.h",
     "engine/configure_reason.h",
@@ -235,6 +233,8 @@ static_library("sync") {
     "engine/passive_model_worker.h",
     "engine/polling_constants.cc",
     "engine/polling_constants.h",
+    "engine/sequenced_model_worker.cc",
+    "engine/sequenced_model_worker.h",
     "engine/shutdown_reason.h",
     "engine/sync_auth_provider.h",
     "engine/sync_backend_registrar.cc",
@@ -885,10 +885,10 @@ source_set("unit_tests") {
     "engine/attachments/fake_attachment_uploader_unittest.cc",
     "engine/attachments/in_memory_attachment_store_unittest.cc",
     "engine/attachments/on_disk_attachment_store_unittest.cc",
-    "engine/browser_thread_model_worker_unittest.cc",
     "engine/cycle/sync_cycle_snapshot_unittest.cc",
     "engine/model_safe_worker_unittest.cc",
     "engine/net/http_bridge_unittest.cc",
+    "engine/sequenced_model_worker_unittest.cc",
     "engine/sync_backend_registrar_unittest.cc",
     "engine/ui_model_worker_unittest.cc",
     "engine_impl/apply_control_data_updates_unittest.cc",