Remove partial magnifier from settings page.

chrome/browser/resources/options/browser_options.js

Index: chrome/browser/resources/options/browser_options.js
diff --git a/chrome/browser/resources/options/browser_options.js b/chrome/browser/resources/options/browser_options.js
index cfa3b1e03229e7d9bf9974943ca70328a8b5d975..dd167355f72a9553a1026e19f3f40efc13aa9e35 100644
--- a/chrome/browser/resources/options/browser_options.js
+++ b/chrome/browser/resources/options/browser_options.js
@@ -405,9 +405,9 @@ cr.define('options', function() {
                       [$('accessibility-high-contrast-check').checked]);
         };
 
-        $('accessibility-screen-magnifier-type').onchange = function(event) {
-          chrome.send('screenMagnifierChange',
-                      [$('accessibility-screen-magnifier-type').value]);
+        $('accessibility-screen-magnifier-check').onchange = function(event) {
+          var checked = $('accessibility-screen-magnifier-check').checked;
+          chrome.send('screenMagnifierChange', [checked ? 'full' : '']);
         };
       }
 
@@ -1190,7 +1190,7 @@ cr.define('options', function() {
      * @private
      */
     setMagnifierTypeState_: function(type) {
-      $('accessibility-screen-magnifier-type').value = type;
+      $('accessibility-screen-magnifier-check').checked = (type != '');
     },
 
     /**