commit ab12990b1b8c2410b34c055e73ed04e8a7ee1d85
author braveyao@webrtc.org <braveyao@webrtc.org@4adac7df-926f-26a2-2b94-8c16560cd09d> Mon Jun 04 03:26:39 2012
committer braveyao@webrtc.org <braveyao@webrtc.org@4adac7df-926f-26a2-2b94-8c16560cd09d> Mon Jun 04 03:26:39 2012
tree e49e7cb6f7c1a3a344a14d852753c39b531adb60
parent 899baa821bfcd5c46e0515c66657b8f5af71cbe5

In the past we support calling StartPlayingFileLocally() before StartPlayout(), then when playout is started, the file would be played out immediately.
Now we would get a failure if we do the same thing and the file would not be played out. Then GTalk/Hangout also reported this failure to us. 
This CL is to restore the original function. 

BUG = Issue 490
TEST = Manual test and voe_auto_test->FileBeforeStreamingTest
Review URL: https://webrtc-codereview.appspot.com/569016

git-svn-id: http://webrtc.googlecode.com/svn/trunk@2347 4adac7df-926f-26a2-2b94-8c16560cd09d