MD History: Tweak appearance of sign-in promotion

chrome/browser/resources/md_history/app.vulcanized.html

Index: chrome/browser/resources/md_history/app.vulcanized.html
diff --git a/chrome/browser/resources/md_history/app.vulcanized.html b/chrome/browser/resources/md_history/app.vulcanized.html
index 425ccb7dbf9be2a2959e50125a8c28d1734f72ac..e920741458276248696d60ae30b4ded74fb3652d 100644
--- a/chrome/browser/resources/md_history/app.vulcanized.html
+++ b/chrome/browser/resources/md_history/app.vulcanized.html
@@ -3803,21 +3803,23 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
 
       #sign-in-promo {
         color: var(--primary-text-color);
-        font-size: 28px;
+        font-size: 215%;
         margin-top: 40px;
       }
 
       #sign-in-promo-desc {
         color: #848484;
-        font-size: 16px;
+        font-size: 123%;
         margin-top: 10px;
       }
 
       #sign-in-button {
         background-color: var(--google-blue-500);
         color: white;
-        font-size: 14px;
+        font-weight: 500;
         margin-top: 24px;
+        padding-left: 12px;
+        padding-right: 12px;
       }
 
       #synced-device-list {