Convert Pass()→std::move() in //chrome (Android edition)

chrome/browser/android/history_report/delta_file_service.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 "chrome/browser/android/history_report/delta_file_service.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/synchronization/waitable_event.h"
 #include "chrome/browser/android/history_report/delta_file_backend_leveldb.h"
@@ skipping 18 matching lines @@
   *result = backend->Trim(lower_bound);
   finished->Signal();
 }
 
 void DoQuery(
     history_report::DeltaFileBackend* backend,
     int64_t last_seq_no,
     int32_t limit,
     base::WaitableEvent* finished,
     scoped_ptr<std::vector<history_report::DeltaFileEntryWithData>>* result) {
-  *result = backend->Query(last_seq_no, limit).Pass();
+  *result = backend->Query(last_seq_no, limit);
   finished->Signal();
 }
 
 void DoRecreate(history_report::DeltaFileBackend* backend,
                 const std::vector<std::string>& urls,
                 base::WaitableEvent* finished,
                 bool* result) {
   *result = backend->Recreate(urls);
   finished->Signal();
 }
@@ skipping 71 matching lines @@
       worker_pool_token_,
       FROM_HERE,
       base::Bind(&DoQuery,
                  base::Unretained(delta_file_backend_.get()),
                  last_seq_no,
                  limit,
                  base::Unretained(&finished),
                  base::Unretained(&result)),
       base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
   finished.Wait();
-  return result.Pass();
+  return result;
 }
 
 bool DeltaFileService::Recreate(const std::vector<std::string>& urls) {
   bool result = false;
   base::WaitableEvent finished(false, false);
   base::SequencedWorkerPool* pool = BrowserThread::GetBlockingPool();
   pool->PostSequencedWorkerTaskWithShutdownBehavior(
       worker_pool_token_,
       FROM_HERE,
       base::Bind(&DoRecreate,
@@ skipping 26 matching lines @@
       base::Bind(&DoDump,
                  base::Unretained(delta_file_backend_.get()),
                  base::Unretained(&finished),
                  base::Unretained(&dump)),
       base::SequencedWorkerPool::BLOCK_SHUTDOWN);
   finished.Wait();
   return dump;
 }
 
 }  // namespace history_report