This CL also implements support for getting the native context on EGL 1.4. It's a bit tricker to get the native handle for EGL 1.0 so it will be done in a separate CL. Bug: webrtc:8257 Change-Id: I269e75c357f19507098180077fa9d1b1ac4dce23 Reviewed-on: https://webrtc-review.googlesource.com/1880 Reviewed-by: Sami Kalliomäki <sakal@webrtc.org> Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19890}