[Bug 1575555] Re: Chrome/Chromium use "Thin" as default font weight

[Gunnar Hjalmarsson]

I tested to replace the single "super" OTC file with 7 weight specific
OTC files, and it seems like this is sufficient to fix "the Thin issue"
in Chrome/Chromium. So I have uploaded a simpler proposal to the PPA.
This variant increases the archive space utilization only fractionally
(73 MiB instead of 71), so no need to break out certain files to a new
binary.

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Title:
  Chrome/Chromium use "Thin" as default font weight

Status in fonts-noto-cjk package in Ubuntu:
  In Progress
Status in language-selector package in Ubuntu:
  Triaged
Status in fonts-noto-cjk source package in Xenial:
  In Progress
Status in language-selector source package in Xenial:
  Triaged

Bug description:
  [Impact]

  Chromium and Google Chrome use "Thin" as the default Noto Sans CJK
  font weight, which makes some Chinese and Japanese web pages difficult
  to read, and thus gives a bad user experience.

  The fonts-noto-cjk version in the PPA

  https://launchpad.net/~gunnarhj/+archive/ubuntu/fonts-noto-cjk

  installs 36 separate font files instead of a bundled OTC file. This
  works around the Chromium/Chrome issue.

  [Test Case]

  To reproduce the bug:

  * Install Chromium or Google Chrome.
  * Go to <http://www.gamer.com.tw> and notice the very thin characters.
  * Install fonts-noto-cjk from the PPA and notice the difference.

  [Regression Potential]

  Due to ISO space concerns, the solution includes the creation of the
  fonts-noto-cjk-extras binary, which will not be seeded. fonts-noto-cjk
  installs only the 8 most important font files, while the rest are
  installed by fonts-noto-cjk-extras. Consequently 28 fonts will be
  dropped when the 16.04 users upgrade to the new fonts-noto-cjk
  package. However,

  - they will be prompted to install fonts-noto-cjk-extras via Language
    Support,

  - fixing the Chromium/Chrome issue carries greater weight, and

  - it's not a regression compared to 14.04 or 15.10, since the previous
    package for rendering Chinese contents (fonts-droid) does not include
    all those font weights.

  [Original description]

  The package seems to only "thin" variant of the font, which makes it
  very unreadable in applications such as Chrome (when it has to fall
  back on Chinese fonts on a mostly-English page). I had to remove the
  package and then manually download the font from Google website and
  install it to make the regular weight available

  Release: 16.04 LTS
  Package Version: 1.004+repack1-1
  Expected: All weights of the noto cjk font to be installed
  Happened: Only the "thin" weight of the font seems to be installed

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