Previously, EGL context was always supplied regardless of useEglContext parameter. Bug: None Change-Id: Iaae93f4f52175674862a101837e0f2ae6575d91b Reviewed-on: https://webrtc-review.googlesource.com/5562 Reviewed-by: Magnus Jedvert <magjed@webrtc.org> Commit-Queue: Sami Kalliomäki <sakal@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20088}