[OsSettingsLanguages] Update input underline border-radius

Spec: http://go/cros-lang-settings-figma
Current view: http://screen/4EAq4TaqjwEyuTq
New view: http://screen/5F8LUQDoHnAYZ2W

Bug: 1113439
Change-Id: Ic3236e1bf3877c17ab6a5149bd865492619ba8ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2437309Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: My Nguyen <myy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812053}

chrome/browser/resources/settings/chromeos/os_languages_page/shared_style.html

@@ -13,6 +13,8 @@
         --cr-search-field-input-padding-bottom: 0;
         --cr-search-field-input-padding-start: 8px;
         --cr-search-field-input-padding-top: 0;
+        --cr-search-field-input-underline-border-radius: 4px;
+        --cr-search-field-input-underline-height: 4px;
         --cr-search-field-input-width: 100%;
         --cr-search-field-search-icon-display: none;
         --cr-search-field-search-icon-fill: var(--cros-icon-color-secondary);

ui/webui/resources/cr_elements/cr_input/cr_input_style_css.html

@@ -80,8 +80,10 @@
       /* Underline styling below. */
       #underline {
         border-bottom: 2px solid var(--cr-input-focus-color);
+        border-radius: var(--cr-input-underline-border-radius, 0);
         bottom: 0;
         box-sizing: border-box;
+        height: var(--cr-input-underline-height, 0);
         left: 0;
         margin: auto;
         opacity: 0;

ui/webui/resources/cr_elements/cr_search_field/cr_search_field.html

@@ -42,6 +42,8 @@
         --cr-input-padding-start: var(--cr-search-field-input-padding-start, 0);
         --cr-input-padding-bottom: var(--cr-search-field-input-padding-bottom, 2px);
         --cr-input-padding-top: var(--cr-search-field-input-padding-top, 2px);
+        --cr-input-underline-border-radius: var(--cr-search-field-input-underline-border-radius, 0);
+        --cr-input-underline-height: var(--cr-search-field-input-underline-height, 0);
         align-self: stretch;
         color: var(--cr-primary-text-color);
         display: block;