MD Settings: Add remapping options for Backspace and Escape

chrome/browser/resources/settings/device_page/keyboard.html

 <link rel="import" href="chrome://resources/cr_elements/cr_slider/cr_slider.html">
 <link rel="import" href="chrome://resources/html/cr.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-collapse/iron-collapse.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout-classes.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/controls/settings_dropdown_menu.html">
 <link rel="import" href="/i18n_setup.html">
 <link rel="import" href="/route.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="settings-keyboard">
   <template>
     <style include="settings-shared"></style>
     <div class="settings-box first">
       <div class="start">$i18n{keyboardKeySearch}</div>
       <settings-dropdown-menu
           pref="{{prefs.settings.language.xkb_remap_search_key_to}}"
-          menu-options="[[keyMapTargetsWithCapsLock_]]">
+          menu-options="[[keyMapTargets_]]">
       </settings-dropdown-menu>
     </div>
     <div class="settings-box">
       <div class="start">$i18n{keyboardKeyCtrl}</div>
       <settings-dropdown-menu
           pref="{{prefs.settings.language.xkb_remap_control_key_to}}"
           menu-options="[[keyMapTargets_]]">
       </settings-dropdown-menu>
     </div>
     <div class="settings-box">
       <div class="start">$i18n{keyboardKeyAlt}</div>
       <settings-dropdown-menu
           pref="{{prefs.settings.language.xkb_remap_alt_key_to}}"
           menu-options="[[keyMapTargets_]]">
       </settings-dropdown-menu>
     </div>
     <template is="dom-if" if="[[showCapsLock_]]">
       <div class="settings-box" id="capsLockKey">
         <div class="start">$i18n{keyboardKeyCapsLock}</div>
         <settings-dropdown-menu
             pref="{{prefs.settings.language.remap_caps_lock_key_to}}"
-            menu-options="[[keyMapTargetsWithCapsLock_]]">
+            menu-options="[[keyMapTargets_]]">
         </settings-dropdown-menu>
       </div>
     </template>
     <template is="dom-if" if="[[showDiamondKey_]]">
       <div class="settings-box" id="diamondKey">
         <div class="start">$i18n{keyboardKeyDiamond}</div>
         <settings-dropdown-menu
             pref="{{prefs.settings.language.remap_diamond_key_to}}"
             menu-options="[[keyMapTargets_]]">
         </settings-dropdown-menu>
       </div>
     </template>
     <div class="settings-box">
+      <div class="start">$i18n{keyboardKeyEscape}</div>
+      <settings-dropdown-menu
+          pref="{{prefs.settings.language.remap_escape_key_to}}"
+          menu-options="[[keyMapTargets_]]">
+      </settings-dropdown-menu>
+    </div>
+    <div class="settings-box">
+      <div class="start">$i18n{keyboardKeyBackspace}</div>
+      <settings-dropdown-menu
+          pref="{{prefs.settings.language.remap_backspace_key_to}}"
+          menu-options="[[keyMapTargets_]]">
+      </settings-dropdown-menu>
+    </div>
+    <div class="settings-box">
       <settings-checkbox
           pref="{{prefs.settings.language.send_function_keys}}"
           label="$i18n{keyboardSendFunctionKeys}"
           sub-label="$i18n{keyboardSendFunctionKeysDescription}">
       </settings-checkbox>
     </div>
     <div class="settings-box">
       <settings-checkbox
           pref="{{prefs.settings.language.xkb_auto_repeat_enabled_r2}}"
           label="$i18n{keyboardEnableAutoRepeat}">
@@ skipping 31 matching lines @@
     <div id="keyboardOverlay" class="settings-box"
         on-tap="onShowKeyboardShortcutsOverlayTap_" actionable>
       $i18n{showKeyboardShortcutsOverlay}
     </div>
     <div class="settings-box" on-tap="onShowLanguageInputTap_" actionable>
       $i18n{keyboardShowLanguageAndInput}
     </div>
   </template>
   <script src="keyboard.js"></script>
 </dom-module>