Minor tweak to Session* to use base::Passed so ownership is clearer

chrome/browser/sessions/base_session_service.cc

 // Copyright (c) 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 "chrome/browser/sessions/base_session_service.h"
 
 #include "base/bind.h"
 #include "base/threading/thread.h"
 #include "chrome/browser/sessions/base_session_service_delegate.h"
 #include "chrome/browser/sessions/session_backend.h"
@@ skipping 73 matching lines @@
         base::TimeDelta::FromMilliseconds(kSaveDelayMS));
   }
 }
 
 void BaseSessionService::Save() {
   DCHECK(backend());
 
   if (pending_commands_.empty())
     return;
 
-  // We create a new ScopedVector which will receive all elements from the
-  // current commands. This will also clear the current list.
   RunTaskOnBackendThread(
       FROM_HERE,
       base::Bind(&SessionBackend::AppendCommands, backend(),
-                 new ScopedVector<SessionCommand>(pending_commands_.Pass()),
+                 base::Passed(&pending_commands_),
                  pending_reset_));
 
   if (pending_reset_) {
     commands_since_reset_ = 0;
     pending_reset_ = false;
   }
 }
 
 bool BaseSessionService::ShouldTrackEntry(const GURL& url) {
   return url.is_valid() && delegate_->ShouldTrackEntry(url);
@@ skipping 27 matching lines @@
   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();
   }
 }