Dark Mode: fix a bunch of wrong colors

When I first started working on this project, the spec had a bunch of
"GG 500" and "GB 300", which to me meant the Material Design colors.

But there's actually a new version of the color palette (GM2) with the
same names, which is a bit of a bummer.

Even more confusingly, various variables in the code use the same naming
scheme as Material Design but for GM2. Ex:

  --google-grey-100 -> Material Design
  --google-grey-200 -> GM2

There are -refresh version of colors, which mean the GM2 equivalent.

  --google-grey-500 -> Material Design
  --google-grey-refresh-500 -> GM2

This is fairly nuts.

Anyways, cuz I'm still mildly hoping WebUI dark mode makes Chrome 73, I
grepped for all the places that use [dark] and then looked for possibly
wrong colors. Here's the command I used:

  $ git gs '\[dark\]' -l | xargs egrep -l \
    '\-\-google-(green|red|blue|grey|gray|yellow)-[1357]00'

And updated the files I found.

I also added some new GM2 equivalents (more -refresh colors) and ran
third_party/polymer/v1_0/rgbify_hex_vars.py on it to produce the -rgb
versions.

BUG=883049
R=dpapad@chromium.org

Change-Id: Ic1160931d70c84fb4cb700a4047e686a93dfbc09
Reviewed-on: https://chromium-review.googlesource.com/c/1415815
Commit-Queue: Dan Beam <dbeam@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624194}
5 files changed