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

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

Renamed capture thread to video_capture thread and encode thread to video_encode thread. It's
mainly to prevent bugs like crbug.com/157992


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=167591

[Wez, 2012-11-14 00:45:19]

lgtm

[commit-bot: I haz the power, 2012-11-14 01:01:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sergeyu@chromium.org/11366226/1

[commit-bot: I haz the power, 2012-11-14 04:11:21]

Change committed as 167591