Fix crash when changing sources after createMediaSourceElement().

content/renderer/media/render_audiosourceprovider.cc

Index: content/renderer/media/render_audiosourceprovider.cc
diff --git a/content/renderer/media/render_audiosourceprovider.cc b/content/renderer/media/render_audiosourceprovider.cc
index 1144b525ac1768835df512e435e3b4055c6ed48c..81f99ce7429738facccf38d05f4b52523983d2f0 100644
--- a/content/renderer/media/render_audiosourceprovider.cc
+++ b/content/renderer/media/render_audiosourceprovider.cc
@@ -105,7 +105,7 @@ void RenderAudioSourceProvider::setClient(
 
   if (client && client != client_) {
     // Detach the audio renderer from normal playback.
-    default_sink_->Pause(true);
+    default_sink_->Stop();
 
     // The client will now take control by calling provideInput() periodically.
     client_ = client;