noahric fe3654d5dc Add native handle support to SimulcastEncoderAdapter.
If all subencoders support textures, the adapter will claim support.
Texture frames will be passed on directly to subencoders, without any
attempt at scaling, and subencoders will be expected to sample/scale
correctly from source textures.

BUG=
NOTRY=true

Review-Url: https://codereview.webrtc.org/2099483002
Cr-Commit-Position: refs/heads/master@{#13365}
2016-07-01 16:06:00 +00:00
..
2016-07-01 07:00:19 +00:00
2016-06-16 13:51:40 +00:00
2016-06-13 07:19:53 +00:00