I am getting it 100% on Fedora 23.

Does the failure go away if you comment out the paths that don't exist on your system? That would be a good way to determine if it matters. :-)

Good idea. No the issue doesn't go away :( . So it doesn't seem to have anything to do with those paths.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fb607474cba9881f85565dffaf924a55c6994bb5

commit fb607474cba9881f85565dffaf924a55c6994bb5
Author: thomasanderson <thomasanderson@google.com>
Date: Tue Jun 28 00:27:37 2016

Fix content shell layout test failure related to Fontconfig

Work around an issue that only occurs on libfontconfig.so.1.9.0

Also update a comment that's no longer accurate

BUG= 621695 

Review-Url: https://codereview.chromium.org/2104653002
Cr-Commit-Position: refs/heads/master@{#402342}

[modify] https://crrev.com/fb607474cba9881f85565dffaf924a55c6994bb5/ui/gfx/test/fontconfig_util_linux.cc

Please try running the content_shell again on ToT

You probably have to manually install these packages

http://launchpadlibrarian.net/107999832/ttf-kochi-gothic_20030809-15_all.deb
http://launchpadlibrarian.net/107999831/ttf-kochi-mincho_20030809-15_all.deb
http://launchpadlibrarian.net/162388639/ttf-indic-fonts-core_0.5.14ubuntu1_all.deb
http://launchpadlibrarian.net/162388648/ttf-punjabi-fonts_0.5.14ubuntu1_all.deb

And you may or may not need this as well
sudo apt-get install apache2 wdiff msttcorefonts

If you need to do either of the above things, please create a new bug to update install_build_deps.sh

Thanks. I had to install apache2, and 3 of the 4 .deb files you linked. Installing one of the .deb files was not necessary, and didn't work anyway:

$ sudo dpkg -i ~/tmp/ttf-punjabi-fonts_0.5.14ubuntu1_all.deb 
Selecting previously unselected package ttf-punjabi-fonts.
(Reading database ... 236833 files and directories currently installed.)
Preparing to unpack .../ttf-punjabi-fonts_0.5.14ubuntu1_all.deb ...
Unpacking ttf-punjabi-fonts (1:0.5.14ubuntu1) ...
dpkg: dependency problems prevent configuration of ttf-punjabi-fonts:
 fonts-guru (2:1.2) breaks ttf-punjabi-fonts (<< 2:1.0) and is installed.
  Version of ttf-punjabi-fonts to be configured is 1:0.5.14ubuntu1.
 fonts-guru-extra (2.0-3) breaks ttf-punjabi-fonts (<< 2:1.0) and is installed.
  Version of ttf-punjabi-fonts to be configured is 1:0.5.14ubuntu1.

dpkg: error processing package ttf-punjabi-fonts (--install):
 dependency problems - leaving unconfigured
Processing triggers for fontconfig (2.11.94-0ubuntu1) ...
Errors were encountered while processing:
 ttf-punjabi-fonts


After all that, the layout tests seem to be running successfully.

I created  issue 624091  as you requested.

Also, as a reminder, I had to manually work around  issue 621694  to get the tests to work.

And then there are hundreds of failures (out of 40173 tests), but I suppose that's normal.