ChromeOS OOBE: use old-style bubble for OOBE Accessibility popup.

ui/login/bubble.css

Index: ui/login/bubble.css
diff --git a/ui/login/bubble.css b/ui/login/bubble.css
index 51c47f6ebe1df4ac14a7ec0f41f7476c83b3d6d5..14663f1267d1294abcc54883b5e0bc1448183bcb 100644
--- a/ui/login/bubble.css
+++ b/ui/login/bubble.css
@@ -18,6 +18,112 @@
   position: absolute;
 }
 
+/* --- oldstyle begin --- */
+
+.bubble[oldstyle] {
+  background: white;
+  border: 1px solid rgba(0, 0, 0, 0.25);
+  color: unset;
+}
+
+.bubble[oldstyle]::before {
+  border-style: solid;
+  border-width: 8px;
+  content: '';
+  display: block;
+  position: absolute;
+}
+
+.bubble-top::before {
+  border-color: rgba(0, 0, 0, 0.25) transparent transparent transparent;
+  bottom: -16px;
+}
+
+html[dir=ltr] .bubble-top::before {
+  left: 17px;
+}
+
+html[dir=rtl] .bubble-top::before {
+  right: 17px;
+}
+
+html[dir=ltr] .bubble-right::before,
+html[dir=rtl] .bubble-left::before {
+  border-color: transparent rgba(0, 0, 0, 0.25) transparent transparent;
+  left: -16px;
+  top: 17px;
+}
+
+.bubble-bottom::before {
+  border-color: transparent transparent rgba(0, 0, 0, 0.25) transparent;
+  top: -16px;
+}
+
+html[dir=ltr] .bubble-bottom::before {
+  left: 17px;
+}
+
+html[dir=rtl] .bubble-bottom::before {
+  right: 17px;
+}
+
+html[dir=ltr] .bubble-left::before,
+html[dir=rtl] .bubble-right::before {
+  border-color: transparent transparent transparent rgba(0, 0, 0, 0.25);
+  right: -16px;
+  top: 17px;
+}
+
+.bubble[oldstyle]::after {
+  border-style: solid;
+  border-width: 8px;
+  content: '';
+  display: block;
+  position: absolute;
+}
+
+.bubble-top::after {
+  border-color: white transparent transparent transparent;
+  bottom: -15px;
+}
+
+html[dir=ltr] .bubble-top::after {
+  left: 17px;
+}
+
+html[dir=rtl] .bubble-top::after {
+  right: 17px;
+}
+
+html[dir=ltr] .bubble-right::after,
+html[dir=rtl] .bubble-left::after {
+  border-color: transparent white transparent transparent;
+  left: -15px;
+  top: 17px;
+}
+
+.bubble-bottom::after {
+  border-color: transparent transparent white transparent;
+  top: -15px;
+}
+
+html[dir=ltr] .bubble-bottom::after {
+  left: 17px;
+}
+
+html[dir=rtl] .bubble-bottom::after {
+  right: 17px;
+}
+
+html[dir=ltr] .bubble-left::after,
+html[dir=rtl] .bubble-right::after {
+  border-color: transparent transparent transparent white;
+  right: -15px;
+  top: 17px;
+}
+
+/* --- oldstyle end --- */
+
 .error-message-bubble::before {
   -webkit-mask-image: url(../../ui/webui/resources/images/warning.svg);
   -webkit-mask-position: left top;