Fix aborting in throttled file system (FSP).

chrome/browser/chromeos/file_system_provider/queue.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "chrome/browser/chromeos/file_system_provider/queue.h"
@@ skipping 107 matching lines @@
           FROM_HERE,
           base::Bind(&Queue::MaybeRun, weak_ptr_factory_.GetWeakPtr()));
       return;
     }
   }
 
   // The task is already removed, marked as completed or aborted.
   NOTREACHED();
 }
 
+bool Queue::IsAborted(size_t token) {
+#if !NDEBUG
+  bool in_queue = executed_.find(token) != executed_.end() ||
+                  completed_.find(token) != completed_.end() ||
+                  aborted_.find(token) != aborted_.end();
+  for (auto& task : pending_) {
+    if (token == task.token) {
+      in_queue = true;
+      break;
+    }
+  }
+  DCHECK(in_queue);
+#endif
+  return aborted_.find(token) != aborted_.end();
+}
+
 }  // namespace file_system_provider
 }  // namespace chromeos