Allow sample rate pass through on Linux.

media/audio/pulse/pulse_util.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 "media/audio/pulse/pulse_util.h"
 
 #include "base/logging.h"
 #include "base/time.h"
 #include "media/audio/audio_manager_base.h"
 #include "media/audio/audio_parameters.h"
@@ skipping 271 matching lines @@
   pa_buffer_attributes.tlength = params.GetBytesPerBuffer() * 3;
   pa_buffer_attributes.fragsize = static_cast<uint32_t>(-1);
 
   // Connect playback stream.  Like pa_buffer_attr, the pa_stream_flags have a
   // huge impact on the performance of the stream and were chosen through trial
   // and error.
   RETURN_ON_FAILURE(
       pa_stream_connect_playback(
           *stream, NULL, &pa_buffer_attributes,
           static_cast<pa_stream_flags_t>(
-              PA_STREAM_FIX_RATE | PA_STREAM_INTERPOLATE_TIMING |
-              PA_STREAM_ADJUST_LATENCY | PA_STREAM_AUTO_TIMING_UPDATE |
-              PA_STREAM_NOT_MONOTONIC | PA_STREAM_START_CORKED),
+              PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_ADJUST_LATENCY |
+              PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_NOT_MONOTONIC |
+              PA_STREAM_START_CORKED),
           NULL, NULL) == 0,
       "pa_stream_connect_playback FAILED ");
 
   // Wait for the stream to be ready.
   while (true) {
     pa_stream_state_t stream_state = pa_stream_get_state(*stream);
     RETURN_ON_FAILURE(
         PA_STREAM_IS_GOOD(stream_state), "Invalid PulseAudio stream state");
     if (stream_state == PA_STREAM_READY)
       break;
     pa_threaded_mainloop_wait(*mainloop);
   }
 
   return true;
 }
 
 #undef RETURN_ON_FAILURE
 
 }  // namespace pulse
 
 }  // namespace media