Clear the FIFO when calling input stream::Stop()

media/audio/pulse/pulse_input.cc

Index: media/audio/pulse/pulse_input.cc
diff --git a/media/audio/pulse/pulse_input.cc b/media/audio/pulse/pulse_input.cc
index 4a56d3a6b1407321484b8c00c85b2cbe81f4cf6a..14ef242759a68d48db6da943ebb899b1089c3cf6 100644
--- a/media/audio/pulse/pulse_input.cc
+++ b/media/audio/pulse/pulse_input.cc
@@ -74,10 +74,6 @@ void PulseAudioInputStream::Start(AudioInputCallback* callback) {
   if (stream_started_)
     return;
 
-  // Clean up the old buffer.
-  pa_stream_drop(handle_);
-  fifo_.Clear();
-
   // Start the streaming.
   callback_ = callback;
   pa_stream_set_read_callback(handle_, &ReadCallback, this);
@@ -99,6 +95,10 @@ void PulseAudioInputStream::Stop() {
   // Set the flag to false to stop filling new data to soundcard.
   stream_started_ = false;
 
+  // Clean up the old buffer.
+  pa_stream_drop(handle_);
+  fifo_.Clear();
+
   pa_operation* operation = pa_stream_flush(handle_,
                                             &pulse::StreamSuccessCallback,
                                             pa_mainloop_);