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The behavior of MediaStreamAudioTrack::Configure() has changed:

Configure() used to be able to complete before any audio sample
is received because the AudioParameter can be obtained from a
WebRtcLocalAudioTrack according to
https://codereview.chromium.org/857093002

After the media stream refactoring http://crbug.com/577874
Configure() remains pending until the first audio frame is
received. For always-on hotword detection with a DSP audio
source, no audio sample is sent until the DSP detects a
potential hotword trigger.

This patch removes MS_CONFIGURED timeout so that the plugin
can keep waiting for a hotword instead of reporting a timeout
error.

BUG=616203
TEST=Verified always-on hotwording on Samus and Chell
Signed-off-by: Ben Zhang <benzh@chromium.org>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2306803003
Cr-Commit-Position: refs/heads/master@{#418997}