Revert of Use spec-compliant algorithm to select video devices in getUserMedia.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index ba237dbb7456508ef52d7f95e0dc915cd77fc2cf..e7d049c0d22cfd26f8f3ce455df2af10182aee9a 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -6097,16 +6097,14 @@
 }
 
 void RenderFrameImpl::InitializeUserMediaClient() {
-  RenderThreadImpl* render_thread = RenderThreadImpl::current();
-  if (!render_thread)  // Will be NULL during unit tests.
+  if (!RenderThreadImpl::current())  // Will be NULL during unit tests.
     return;
 
 #if BUILDFLAG(ENABLE_WEBRTC)
   DCHECK(!web_user_media_client_);
   web_user_media_client_ = new UserMediaClientImpl(
       this, RenderThreadImpl::current()->GetPeerConnectionDependencyFactory(),
-      base::MakeUnique<MediaStreamDispatcher>(this),
-      render_thread->GetWorkerTaskRunner());
+      base::MakeUnique<MediaStreamDispatcher>(this));
   GetInterfaceRegistry()->AddInterface(
       base::Bind(&MediaDevicesListenerImpl::Create, GetRoutingID()));
 #endif