ChromeOS: Update Welcome screen material design OOBE.

chrome/browser/resources/chromeos/login/oobe_text_button.css

Index: chrome/browser/resources/chromeos/login/oobe_text_button.css
diff --git a/chrome/browser/resources/chromeos/login/oobe_text_button.css b/chrome/browser/resources/chromeos/login/oobe_text_button.css
index dd72df22ee5733599da7269292ea556eb22d464d..3b302415e7e498709f15eec033dd4064d42704cf 100644
--- a/chrome/browser/resources/chromeos/login/oobe_text_button.css
+++ b/chrome/browser/resources/chromeos/login/oobe_text_button.css
@@ -3,8 +3,8 @@
    found in the LICENSE file. */
 
 #textButton {
-  font: 13px 'Roboto Medium', sans-serif;
-  height: 32px;
+  height: 28px;
+  margin: 0;
   padding: 0 16px;
 }
 
@@ -17,3 +17,9 @@
   background-color: var(--google-blue-500);
   color: white;
 }
+
+::content * {
+  font: var(--oobe-roboto-medium), sans-serif;
+  font-size: 12px;
+  text-transform: none;
+}