Add RetainedRef uses where needed.

components/sessions/core/base_session_service.cc

 // Copyright 2012 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 "components/sessions/core/base_session_service.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 143 matching lines @@
     base::CancelableTaskTracker* tracker) {
   base::CancelableTaskTracker::IsCanceledCallback is_canceled;
   base::CancelableTaskTracker::TaskId id =
       tracker->NewTrackedTaskId(&is_canceled);
 
   GetCommandsCallback run_if_not_canceled =
       base::Bind(&RunIfNotCanceled, is_canceled, callback);
 
   GetCommandsCallback callback_runner =
       base::Bind(&PostOrRunInternalGetCommandsCallback,
-                 base::ThreadTaskRunnerHandle::Get(), run_if_not_canceled);
+                 base::RetainedRef(base::ThreadTaskRunnerHandle::Get()),
+                 run_if_not_canceled);
 
   RunTaskOnBackendThread(
       FROM_HERE,
       base::Bind(&SessionBackend::ReadLastSessionCommands, backend_,
                  is_canceled, callback_runner));
   return id;
 }
 
 void BaseSessionService::RunTaskOnBackendThread(
     const tracked_objects::Location& from_here,
     const base::Closure& task) {
   base::SequencedWorkerPool* pool = delegate_->GetBlockingPool();
   if (!pool->IsShutdownInProgress()) {
     pool->PostSequencedWorkerTask(sequence_token_, from_here, task);
   } else {
     // Fall back to executing on the main thread if the sequence
     // worker pool has been requested to shutdown (around shutdown
     // time).
     task.Run();
   }
 }
 
 }  // namespace sessions