Keep using highlight and highlighttext colors for in-page date/month/time controls.

This CL removes the background-color added for date/month/time controls in order to continue
using the highlight and highlightext colors to match the active selection background
and foreground colors (specified in input_multiple_fields.css?l=54).

Bug: 1021328
Change-Id: Ic064697f14f508e3336b41c2c4801122d0175ede
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1907595
Commit-Queue: Ionel Popescu <iopopesc@microsoft.com>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Mason Freed <masonfreed@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714645}

third_party/blink/renderer/core/html/resources/controls_refresh.css

@@ -146,20 +146,6 @@ input::-webkit-calendar-picker-indicator:hover {
   background-color: initial;
 }
 
-/* Remove focus ring from fields and use highlight color */
-input::-webkit-datetime-edit-ampm-field:focus,
-input::-webkit-datetime-edit-day-field:focus,
-input::-webkit-datetime-edit-hour-field:focus,
-input::-webkit-datetime-edit-millisecond-field:focus,
-input::-webkit-datetime-edit-minute-field:focus,
-input::-webkit-datetime-edit-month-field:focus,
-input::-webkit-datetime-edit-second-field:focus,
-input::-webkit-datetime-edit-week-field:focus,
-input::-webkit-datetime-edit-year-field:focus {
-  background-color: rgba(0, 120, 212, 0.4);
-  outline: none;
-}
-
 /* -internal-list-box is how we specify select[multiple] */
 /* select[multiple] is an exception to the prohibition on sizes here
    because it is one of the few controls with borders that grow on zoom