[fsp] Fix unhappy MSAN build bots.

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"
 
 namespace chromeos {
 namespace file_system_provider {
 
-struct Queue::Task {
-  Task() : token(0), completed(false) {}
-  Task(size_t token, const AbortableCallback& callback)
-      : token(token), completed(false), callback(callback) {}
+Queue::Task::Task() : token(0), completed(false) {
+}
 
-  size_t token;
-  bool completed;
-  AbortableCallback callback;
-  AbortCallback abort_callback;
-};
+Queue::Task::Task(size_t token, const AbortableCallback& callback)
+    : token(token), completed(false), callback(callback) {
+}
+
+Queue::Task::~Task() {
+}
 
 Queue::Queue(size_t max_in_parallel)
     : max_in_parallel_(max_in_parallel),
       next_token_(1),
       weak_ptr_factory_(this) {
   DCHECK_LT(0u, max_in_parallel);
 }
 
 Queue::~Queue() {
 }
@@ skipping 75 matching lines @@
       return;
     }
   }
 
   // The task is already removed.
   callback.Run(base::File::FILE_ERROR_INVALID_OPERATION);
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos