GitLab

This CL is adding unittests for GetFallbackFont(...) API.
The goal is to increase coverage of the fallback font code
for cases where the base font is not the default system
font.

Some chrome users are changing their default system font
which may create bad cases for fallback fonts API.

There are two unittests that required change:
  1) Lao (u+0ED0)
  2) Nko (u+07C1)
In these two cases, the codepoint is present in "Segeo UI"
but is not present in "Segeo UI Italic".

Change-Id: Id9c50be56e025ae0c4a4651b1e2c47812430015d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1948091
Commit-Queue: Etienne Bergeron <etienneb@chromium.org>
Reviewed-by: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721500}