Hide accessibility options for unimplemented features.

chrome/browser/resources/options/chromeos/system_options.html

Index: chrome/browser/resources/options/chromeos/system_options.html
diff --git a/chrome/browser/resources/options/chromeos/system_options.html b/chrome/browser/resources/options/chromeos/system_options.html
index 869993828d9d1c7ff3a74a82a9957b295fc18207..957903740becc3e803eec15449a1bf7adfcb6c6b 100644
--- a/chrome/browser/resources/options/chromeos/system_options.html
+++ b/chrome/browser/resources/options/chromeos/system_options.html
@@ -122,7 +122,7 @@
             </label>
           </div>
         </div>
-        <div class="option-name">
+        <div class="option-name" hidden="true">

[James Hawkins, 2012/01/31 18:49:07]

For future reference, hidden is an empty attribute so you shouldn't set it to a
'true' value.

           <div class="checkbox">
             <label>
               <input id="accessibility-high-contrast-check" type="checkbox">
@@ -130,7 +130,7 @@
             </label>
           </div>
         </div>
-        <div class="option-name">
+        <div class="option-name" hidden="true">
           <div class="checkbox">
             <label>
               <input id="accessibility-screen-magnifier-check" type="checkbox">
@@ -138,7 +138,7 @@
             </label>
           </div>
         </div>
-        <div class="option-name">
+        <div class="option-name" hidden="true">
           <div class="checkbox">
             <label>
               <input id="accessibility-virtual-keyboard-check" type="checkbox">