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

remoting/host/chromoting_host.cc

Index: remoting/host/chromoting_host.cc
diff --git a/remoting/host/chromoting_host.cc b/remoting/host/chromoting_host.cc
index 8abeda203ae99176b1d9ca9b5e42913841d12c17..8a9c41d98f67ec861a5c531134a3dc6541ca3ec7 100644
--- a/remoting/host/chromoting_host.cc
+++ b/remoting/host/chromoting_host.cc
@@ -60,14 +60,14 @@ ChromotingHost::ChromotingHost(
     DesktopEnvironmentFactory* desktop_environment_factory,
     scoped_ptr<protocol::SessionManager> session_manager,
     scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> video_encode_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> network_task_runner)
     : desktop_environment_factory_(desktop_environment_factory),
       session_manager_(session_manager.Pass()),
       audio_task_runner_(audio_task_runner),
-      capture_task_runner_(capture_task_runner),
-      encode_task_runner_(encode_task_runner),
+      video_capture_task_runner_(video_capture_task_runner),
+      video_encode_task_runner_(video_encode_task_runner),
       network_task_runner_(network_task_runner),
       signal_strategy_(signal_strategy),
       clients_count_(0),
@@ -314,8 +314,8 @@ void ChromotingHost::OnIncomingSession(
   scoped_refptr<ClientSession> client = new ClientSession(
       this,
       audio_task_runner_,
-      capture_task_runner_,
-      encode_task_runner_,
+      video_capture_task_runner_,
+      video_encode_task_runner_,
       network_task_runner_,
       connection.Pass(),
       desktop_environment_factory_,