GitLab

Use the presence of the GL_CHROMIUM_compressed_texture_etc extension as
an indicator that there is native support for
GL_OES_compressed_ETC1_RGB8_texture in ANGLE.

BUG=882580

Change-Id: Ibb0032052d971a19f00ebb2e5815da9185aa5148
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1666870Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#671474}