commit 10dfb32e5a368de7bda04e3d9e56e0de1636ff36
author Alex Danilo <adanilo@chromium.org> Fri Mar 22 05:59:28 2019
committer Commit Bot <commit-bot@chromium.org> Fri Mar 22 05:59:28 2019
tree 50a3a2f6ebc624f522d48e9e2868de3688a73a1c
parent b01ba24caf15842c14654439cb68929b4c7fb776

Add Quickview support for sniffed text/plain.

Quickview will display text documents if the file name
extension is '.txt' but ignored files without an
extension even if the metadata identified it as
text.

This CL uses the sniffed MIME type from local files to
allow display of files detected to be of type text/plain.

Also, this CL adds a new video file 'world.webm' and changes
the integration test for quickview of video since the existing
test was using a file with the filename extension of '.ogv'
that is MIME sniffed as audio/ogg instead of video.

Bug: 772600
Tests: Added integration test and test file 'plaintext'.
Change-Id: Ic3563543ad26090871553159a22c758efc3a0ae8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1518261
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Alex Danilo <adanilo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643273}