zijiehe 3045589e5f Remove references of ScreenCapturer and WindowCapturer
This change removes references of ScreenCapturer and WindowCapturer from WebRTC.
So after this change, ScreenCapturer and WindowCapturer classes can be entirely
removed.

BUG=webrtc:6513

Review-Url: https://codereview.webrtc.org/2489943004
Cr-Commit-Position: refs/heads/master@{#15006}
2016-11-10 00:37:57 +00:00
..