Options2: Pull the trigger.

chrome/browser/resources/options2/autofill_options.css

+.autofill-list-item {
+  -webkit-box-flex: 1;
+  -webkit-padding-start: 8px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.autofill-list-item + img {
+  -webkit-padding-end: 20px;
+  vertical-align: middle;
+}
+
+#autofill-options > div:last-child {
+  margin-top: 15px;
+}
+
+#autofill-options > div.settings-list > div:last-child {
+  border-top: 1px solid #d9d9d9;
+  padding: 5px 10px;
+}
+
+#autofill-add-address,
+#autofill-add-creditcard {
+  margin: 2px 0;
+}
+
+.autofill-list-item + button,
+.autofill-list-item + img + button {
+  background: #8aaaed !important;  /* Gets overwritten by raw-button:hover */
+  color: #fff;
+  margin-top: 0;
+}
+
+#address-list > div:not(:hover) * button,
+#creditcard-list > div:not(:hover) * button {
+  display: none;
+}