GitLab

This CL includes the following changes:
- calendar_picker_refresh.css was added as a way to extend the current
style used for date popup
- calendarPicker.js was changed:
    - to support different sizes for cells
    - to provide different icons for forward, back month buttons
    - todayButton was moved to a different position
- locale_win | icu | mac to change the label used for weekdays to the
shortest one provided by each platform

Added tests to validate the new UI for input type="date". Although the
current change affects other types (datetime-local, week, month) this change
is the first of a series of changes which will update the popup UI for all
these types and tests will be added for each type.

Bug: 988155
Change-Id: Ibfbddd9f523f4adad79b6af2520989c3980bc18c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1721842
Commit-Queue: Ionel Popescu <iopopesc@microsoft.com>
Reviewed-by: Mason Freed <masonfreed@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682420}