zijiehe b68d655f36 Add DesktopCapturer GetSourceList SelectSource FocusOnSelectedSource functions
I have chosen part of 2435603010 changes to compose this change.
According to the discussion we have made in previous change, this CL contains,
1. Source structure to represent a source of a DesktopCapturer.
2. GetSourceList / SelectSource / FocusOnSelectedSource functions in
DesktopCapturer.
3. ScreenCapturer and WindowCapturer forward corresponding functions to the new
DesktopCapturer APIs.

After this change, We can remove WindowCapturer & ScreenCapturer references from
Chromium, and use the new APIs.

BUG=webrtc:6513

Committed: https://crrev.com/9cb0b3b4ac916cdf52d97a63d923dfbe73f0541e
Review-Url: https://codereview.webrtc.org/2452263003
Cr-Original-Commit-Position: refs/heads/master@{#14830}
Cr-Commit-Position: refs/heads/master@{#14832}
2016-10-29 00:35:16 +00:00
..
2016-09-29 11:12:51 +00:00
2016-10-25 11:31:27 +00:00
2015-11-16 19:02:02 +00:00
2016-06-23 10:52:35 +00:00

Name: WebRTC
URL: http://www.webrtc.org
Version: 90
License: BSD
License File: LICENSE

Description:
WebRTC provides real time voice and video processing
functionality to enable the implementation of 
PeerConnection/MediaStream.

Third party code used in this project is described 
in the file LICENSE_THIRD_PARTY.