Add 5 experimental accessibility features on Chrome OS.

chrome/browser/resources/options/browser_options.html

 <div id="settings" class="page" hidden>
   <header>
     <h1 i18n-content="settingsTitle"></h1>
   </header>
   <include src="automatic_settings_reset_banner.html">
 <if expr="chromeos">
   <link rel="import" href="chrome://resources/cr_elements/network/cr_network_icon.html">
   <link rel="import" href="chrome://resources/cr_elements/network/cr_onc_types.html">
   <include src="secondary_user_banner.html">
   <section id="network-section-cros">
@@ skipping 948 matching lines @@
           <input pref="settings.a11y.virtual_keyboard" type="checkbox"
               metric="Options_AccessibilityOnScreenKeyboard">
           <span>
             <span i18n-content="accessibilityVirtualKeyboard"></span>
             <span class="controlled-setting-indicator"
                 pref="settings.a11y.virtual_keyboard"></span>
           </span>
         </label>
       </div>
     </div>
+    <div id="experimental-accessibility-features" hidden>
+      <div class="option_name" id="accessibility_caret_highlight">

[Dan Beam, 2016/03/11 22:07:19]

ids-like-this-in-all-your-new-code

or just remove these IDs because I don't see where you actually use them

[dmazzoni, 2016/03/14 04:24:53]

Removed

+        <div class="checkbox controlled-setting-with-label">
+          <label>
+            <input pref="settings.a11y.caret_highlight" type="checkbox"
+                metric="Options_AccessibilityCaretHighlight">
+            <span>
+              <span i18n-content="accessibilityCaretHighlight"></span>
+              <span class="controlled-setting-indicator"
+                  pref="settings.a11y.caret_highlight"></span>
+            </span>
+          </label>
+        </div>
+      </div>
+      <div class="option_name" id="accessibility_cursor_highlight">
+        <div class="checkbox controlled-setting-with-label">
+          <label>
+            <input pref="settings.a11y.cursor_highlight" type="checkbox"
+                metric="Options_AccessibilityCursorHighlight">
+            <span>
+              <span i18n-content="accessibilityCursorHighlight"></span>
+              <span class="controlled-setting-indicator"
+                  pref="settings.a11y.cursor_highlight"></span>
+            </span>
+          </label>
+        </div>
+      </div>
+      <div class="option_name" id="accessibility_focus_highlight">
+        <div class="checkbox controlled-setting-with-label">
+          <label>
+            <input pref="settings.a11y.focus_highlight" type="checkbox"
+                metric="Options_AccessibilityFocusHighlight">
+            <span>
+              <span i18n-content="accessibilityFocusHighlight"></span>
+              <span class="controlled-setting-indicator"
+                  pref="settings.a11y.focus_highlight"></span>
+            </span>
+          </label>
+        </div>
+      </div>
+      <div class="option_name" id="accessibility_select_to_speak">
+        <div class="checkbox controlled-setting-with-label">
+          <label>
+            <input pref="settings.a11y.select_to_speak" type="checkbox"
+                metric="Options_AccessibilitySelectToSpeak">
+            <span>
+              <span i18n-content="accessibilitySelectToSpeak"></span>
+              <span class="controlled-setting-indicator"
+                  pref="settings.a11y.select_to_speak"></span>
+            </span>
+          </label>
+        </div>
+      </div>
+      <div class="option_name" id="accessibility_switch_access">
+        <div class="checkbox controlled-setting-with-label">
+          <label>
+            <input pref="settings.a11y.switch_access" type="checkbox"
+                metric="Options_AccessibilitySwitchAccess">
+            <span>
+              <span i18n-content="accessibilitySwitchAccess"></span>
+              <span class="controlled-setting-indicator"
+                  pref="settings.a11y.switch_access"></span>
+            </span>
+          </label>
+        </div>
+      </div>
+    </div>
   </div>
 </if>
 
 </section>
 
 <if expr="chromeos">
   <section id="factory-reset-section" hidden>
     <h3 i18n-content="factoryResetTitle"></h3>
     <div>
       <span class="settings-row" i18n-content="factoryResetDescription">
@@ skipping 44 matching lines @@
       </button>
     </div>
   </section>
   </div>  <!-- advanced-settings-container -->
   </div>  <!-- advanced-settings -->
   <footer id="advanced-settings-footer">
     <a is="action-link" id="advanced-settings-expander"
         i18n-content="showAdvancedSettings"></a>
   </footer>
 </div>