Support multi-line braille in the virtual braille display.

chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.css

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.css
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.css b/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.css
index a24a10c00f71a40fbfbba3fa0cec622bbc2ed559..1b9cfa87bf4559b962875283175bdf66bd134ddb 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.css
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.css
@@ -101,10 +101,24 @@ button {
 
 #braille-container {
   height: 35px;
+  overflow: hidden;
   position: relative;
   top: -35px;
 }
 
+#braille-table-holder-outer {
+  display: flex;
+  height: 100%;
+  overflow: scroll;
+  padding-bottom: 17px;
+  padding-right: 17px;
+  width: 100%;
+}
+
+.braille-table-holder {
+  flex-grow: 1;
+}
+
 #braille-text {
   font-family: 'Droid Sans Mono', Courier, monospace;
   font-size: 12pt;
@@ -300,11 +314,20 @@ button {
 }
 
 table#braille-table {
-  border: none;
+  border-spacing: 0;
+}
+
+table#braille-table2 {
   border-spacing: 0;
 }
 
 table#braille-table * {
+  border: 1px solid black;
+  color: #fff;
+}
+
+table#braille-table2 * {
+  border: 1px solid black;
   color: #fff;
 }