Rename capture and encode threads to make it clear that they are for video.

remoting/host/remoting_me2me_host.cc

Index: remoting/host/remoting_me2me_host.cc
diff --git a/remoting/host/remoting_me2me_host.cc b/remoting/host/remoting_me2me_host.cc
index cdf6962b31ee2a892356f655cbb26b9d5e502811..81e49cfa6432c7e558e3593d49ea6f7fc42e4a97 100644
--- a/remoting/host/remoting_me2me_host.cc
+++ b/remoting/host/remoting_me2me_host.cc
@@ -791,8 +791,8 @@ void HostProcess::StartHost() {
       CreateHostSessionManager(network_settings,
                                context_->url_request_context_getter()),
       context_->audio_task_runner(),
-      context_->capture_task_runner(),
-      context_->encode_task_runner(),
+      context_->video_capture_task_runner(),
+      context_->video_encode_task_runner(),
       context_->network_task_runner());
 
   // TODO(simonmorris): Get the maximum session duration from a policy.