Cast: Fix use after free in a testing tool

cast_simulator should call .Pass() to pass the PacketPipe for
simulation.

TBR=miu

Review URL: https://codereview.chromium.org/463373003

Cr-Commit-Position: refs/heads/master@{#289226}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289226 0039d316-1c4b-4281-b951-d872f2087c98

media/cast/test/simulator.cc

@@ -283,10 +283,12 @@ void RunSimulation(const base::FilePath& source_path,
 
   // Connect sender to receiver. This initializes the pipe.
   receiver_to_sender.Initialize(
-      ipp.NewBuffer(128 * 1024), transport_sender->PacketReceiverForTesting(),
+      ipp.NewBuffer(128 * 1024).Pass(),
+      transport_sender->PacketReceiverForTesting(),
       task_runner, &testing_clock);
   sender_to_receiver.Initialize(
-      ipp.NewBuffer(128 * 1024), cast_receiver->packet_receiver(), task_runner,
+      ipp.NewBuffer(128 * 1024).Pass(),
+      cast_receiver->packet_receiver(), task_runner,
       &testing_clock);
 
   // Start receiver.