Update the color of selected/today date in HC.

Bug: 994219
Change-Id: I7b7f79d2d5fb5898491ea39568bfb1163450ff1c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1844432
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@{#703542}

third_party/blink/renderer/core/html/forms/resources/calendar_picker_refresh.css

@@ -253,6 +253,7 @@ body {
   .month-button.selected,
   .week-number-cell.selected {
     background-color: Highlight;
+    color: Window;
   }
 
   .day-cell.highlighted.today,
@@ -260,6 +261,7 @@ body {
   .month-button.today {
     background-color: Highlight;
     border: 2px solid Window !important;
+    color: Window;
   }
 
   .day-cell.selected.today,