Suppress sequence checks in SyncFileSystem on the shutdown phase

chrome/browser/sync_file_system/drive_backend/sync_task_token.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_task_token.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_task_token.cc b/chrome/browser/sync_file_system/drive_backend/sync_task_token.cc
index 590e9a808ace07bed7d2735aa6d14ebc1e697343..b4d58bf862d2713c45ebfbb6ef3a6333a88c6878 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_task_token.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_task_token.cc
@@ -70,6 +70,9 @@ SyncTaskToken::~SyncTaskToken() {
   // dropped by a task without returning.
   if (task_runner_.get() && task_runner_->RunsTasksOnCurrentThread() &&
       manager_ && manager_->IsRunningTask(token_id_)) {
+    if (!manager_->ShouldTrackTaskToken())
+      return;
+
     NOTREACHED()
         << "Unexpected TaskToken deletion from: " << location_.ToString();