[Autofill Views] Fixing Label Colors

This change solves two problems related to font colors:
* Changes passed down from UX have requested the use of the subtext/hint
  color for all text in footer rows.
* A bug causes text colors to change (permanently) to incorrect values
  when hover styles are applied. This was observed on Linux under GTK+
  theme only. We don't need to modify text colors during RefreshStyle
  anyway, so the simplest fix is to define these at initialization and
  not touch them again.

Change-Id: I80d2de91bb7067b3dc8fea6f369c83658e15c22a
Bug: 861883, 859887
Reviewed-on: https://chromium-review.googlesource.com/1130015
Commit-Queue: Tommy Martino <tmartino@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Fabio Tirelo <ftirelo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573532}
1 file changed