Add autoclick to settings page under the accessibility section.

chrome/browser/resources/options/browser_options.css

Index: chrome/browser/resources/options/browser_options.css
diff --git a/chrome/browser/resources/options/browser_options.css b/chrome/browser/resources/options/browser_options.css
index 13ad987c9a01ab53142ed7396aafc6917f31a432..75ead6272783a81e247538fc59d1c40707017cce 100644
--- a/chrome/browser/resources/options/browser_options.css
+++ b/chrome/browser/resources/options/browser_options.css
@@ -402,3 +402,28 @@ list:not([disabled]) > .network-group[selected] {
   /* Same as .settings-row {margin}. */
   -webkit-border-vertical-spacing: 0.65em;
 }
+
+#accessibility-autoclick {
+  overflow: hidden;
+  /* Same as controlled-setting-with-label. */
+  padding-bottom: 7px;
+  padding-top: 7px;
+}
+
+#accessibility-autoclick .checkbox {
+  float: left;
+}
+
+html[dir=rtl] #accessibility-autoclick .checkbox {
+  float: right;
+}
+
+#accessibility-autoclick-subrow {
+  /* Same as controlled-setting-with-label > input + span. */
+  -webkit-margin-start: 0.6em;
+  float: left;
+}
+
+html[dir=rtl] #accessibility-autoclick-subrow {
+  float: right;
+}