Center the focus of the text input in magnifier screen.

chrome/browser/resources/options/browser_options.html

Index: chrome/browser/resources/options/browser_options.html
diff --git a/chrome/browser/resources/options/browser_options.html b/chrome/browser/resources/options/browser_options.html
index 8a6be134fc2e61bd328191ad8e4b356faf9f5218..f0e9d7ac876533190df99cd72815212be93e1ff8 100644
--- a/chrome/browser/resources/options/browser_options.html
+++ b/chrome/browser/resources/options/browser_options.html
@@ -885,6 +885,7 @@
       <div class="checkbox controlled-setting-with-label">
         <label>
           <input
+              id="accessibility-screen-magnifier-check"
               pref="settings.a11y.screen_magnifier" type="checkbox"
               metric="Options_AccessibilityScreenMagnifier">
           <span>
@@ -894,6 +895,21 @@
           </span>
         </label>
       </div>
+      <div class="checkbox controlled-setting-with-label">
+        <!-- No whitespace between elements. -->
+        <input type="checkbox" class="spacer-checkbox">
+        <label>
+          <input
+              id = "accessibility-screen-magnifier-center-focus-check"
+              pref="settings.a11y.screen_magnifier_center_focus" type="checkbox"
+              metric="Options_AccessibilityScreenMagnifierCenterFocus">
+          <span>
+            <span i18n-content="accessibilityScreenMagnifierCenterFocus"></span>
+            <span class="controlled-setting-indicator"
+                pref="settings.a11y.screen_magnifier_center_focus"></span>
+          </span>
+        </label>
+      </div>
     </div>
     <div class="option-name" id="accessibility-tap-dragging">
       <div class="checkbox">