Add border to controls popups.

Prior to this CL on platforms where popups don't have drop shadow,
the content of the popups is going to blend with the rest of the page.

This CL adds border to popups in order to avoid the issue described above.

Bug: 1048219
Change-Id: Ifb69fb204239f8d95f6b3feab704505709cbddf6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2036250
Commit-Queue: Ionel Popescu <iopopesc@microsoft.com>
Reviewed-by: Mason Freed <masonfreed@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738461}

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

@@ -53,7 +53,7 @@ body.controls-refresh {
 }
 
 .controls-refresh .color-suggestion-picker-main {
-    border: 0;
+    border: 1px solid #bfbfbf;
     box-shadow: none;
     padding: 8px 8px 4px 8px;
 }

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

@@ -14,6 +14,7 @@ body {
 
 color-picker {
   background: #FFFFFF;
+  border: 1px solid #bfbfbf;
   display: flex;
   flex-direction: column;
   height: 250px;

third_party/blink/renderer/core/html/forms/resources/month_picker.js

@@ -10,7 +10,7 @@
 function initializeMonthPicker(config) {
   global.picker = new MonthPicker(config);
   main.append(global.picker);
-  main.style.border = '1px solid transparent';
+  main.style.border = '1px solid #bfbfbf';
   main.style.height = (MonthPicker.Height - 2) + 'px';
   main.style.width = (MonthPicker.Width - 2) + 'px';
   resizeWindow(MonthPicker.Width, MonthPicker.Height);

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

@@ -56,7 +56,7 @@
 }
 
 .controls-refresh .suggestion-list {
-  border-color: transparent;
+  border-color: #bfbfbf;
   padding: 4px;
 }
 

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

@@ -9,10 +9,10 @@ body {
 
 .time-picker {
   background: #FFFFFF;
-  border: 1px solid transparent;
+  border: 1px solid #bfbfbf;
   display: flex;
   flex-direction: column;
-  height: 260px;
+  height: 258px;
 }
 
 .time-columns {