Ensures that WebRTC works for device selection using a different sample rate than default

content/renderer/media/media_stream_dependency_factory_unittest.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 "base/memory/scoped_ptr.h"
 #include "content/common/media/media_stream_options.h"
 #include "content/renderer/media/media_stream_extra_data.h"
 #include "content/renderer/media/media_stream_source_extra_data.h"
 #include "content/renderer/media/mock_media_stream_dependency_factory.h"
 #include "content/renderer/media/mock_web_rtc_peer_connection_handler_client.h"
@@ skipping 42 matching lines @@
                                                            bool video) {
     WebKit::WebVector<WebKit::WebMediaStreamSource> audio_sources(
                       audio ? static_cast<size_t>(1) : 0);
     WebKit::WebVector<WebKit::WebMediaStreamSource> video_sources(
         video ? static_cast<size_t>(1) : 0);
 
     if (audio) {
       StreamDeviceInfo info;
       info.device.type = content::MEDIA_DEVICE_AUDIO_CAPTURE;
       info.device.name = "audio";
+      info.device.sample_rate = 0;
+      info.device.channel_layout = 0;
       info.session_id = 99;
       audio_sources[0].initialize("audio",
                                   WebKit::WebMediaStreamSource::TypeAudio,
                                   "audio");
       audio_sources[0].setExtraData(
               new MediaStreamSourceExtraData(info));
     }
     if (video) {
       StreamDeviceInfo info;
       info.device.type = content::MEDIA_DEVICE_VIDEO_CAPTURE;
@@ skipping 77 matching lines @@
   EXPECT_TRUE(dependency_factory_->EnsurePeerConnectionFactory());
   dependency_factory_->CreateNativeLocalMediaStream(&stream_desc);
   MediaStreamExtraData* extra_data = static_cast<MediaStreamExtraData*>(
       stream_desc.extraData());
   ASSERT_TRUE(extra_data && extra_data->local_stream());
   EXPECT_EQ(0u, extra_data->local_stream()->video_tracks()->count());
   EXPECT_EQ(0u, extra_data->local_stream()->audio_tracks()->count());
 }
 
 }  // namespace content