Remove the call to Terminate() on the main thread.

Terminate() must be called on the signaling thread so if the WebRtcAudioDevice hasn't already been uninitialized, there isn't much we can do and instead we need to figure out why and fix it (there might not be a problem).

BUG=447042
R=henrika@chromium.org

Review URL: https://codereview.chromium.org/1523053006 .

Cr-Commit-Position: refs/heads/master@{#365218}

content/renderer/media/webrtc_audio_device_impl.cc

@@ -42,7 +42,7 @@ WebRtcAudioDeviceImpl::WebRtcAudioDeviceImpl()
 WebRtcAudioDeviceImpl::~WebRtcAudioDeviceImpl() {
   DVLOG(1) << "WebRtcAudioDeviceImpl::~WebRtcAudioDeviceImpl()";
   DCHECK(main_thread_checker_.CalledOnValidThread());
-  Terminate();
+  DCHECK(!initialized_) << "Terminate must have been called.";
 }
 
 int32_t WebRtcAudioDeviceImpl::AddRef() const {