Fix Password Manager Performance Issues

chrome/browser/resources/options/password_manager.css

Index: chrome/browser/resources/options/password_manager.css
diff --git a/chrome/browser/resources/options/password_manager.css b/chrome/browser/resources/options/password_manager.css
index 1bb9997c9d528888265af7fccc7c95036456d91d..95b8861e37b0359e790ae44c3d988f943bde74e7 100644
--- a/chrome/browser/resources/options/password_manager.css
+++ b/chrome/browser/resources/options/password_manager.css
@@ -25,3 +25,11 @@ html[dir=rtl] #password-search-column {
 #passwords-title {
   display: inline-block;
 }
+
+#saved-passwords-list {
+  max-height: 192px;
+}
+
+#password-exceptions-list {
+  max-height: 192px;
+}

[Dan Beam, 2016/10/25 00:50:17]

nit: combine rules and add a comment

#saved-passwords-list,
#password-exceptions-list {
  max-height: 192px;  /* For performance (crbug.com/651049). */
}