[MD settings] propagate stopKeyboardEventPropagation to paper-input

chrome/browser/resources/settings/appearance_page/appearance_page.html

 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-radio-button/paper-radio-button.html">
 <link rel="import" href="/appearance_page/appearance_browser_proxy.html">
 <link rel="import" href="/controls/settings_dropdown_menu.html">
 <link rel="import" href="/controls/settings_input.html">
@@ skipping 54 matching lines @@
         </div>
         <template is="dom-if" if="[[prefs.browser.show_home_button.value]]">
           <div class="list-frame">
             <settings-radio-group pref="{{prefs.homepage_is_newtabpage}}">
               <paper-radio-button class="list-item" name="true">
                 $i18n{homePageNtp}
               </paper-radio-button>
               <paper-radio-button class="list-item" name="false">
                 $i18n{other}
                 <settings-input no-label-float pref="{{prefs.homepage}}"
-                    label="$i18n{exampleDotCom}">
+                    label="$i18n{exampleDotCom}"
+                    stop-keyboard-event-propagation>
                 </settings-input>
               </paper-radio-button>
             </settings-radio-group>
           </div>
         </template>
         <div class="settings-box">
           <settings-checkbox class="start" label="$i18n{showBookmarksBar}"
               pref="{{prefs.bookmark_bar.show_on_all_tabs}}">
           </settings-checkbox>
         </div>
@@ skipping 26 matching lines @@
       <template is="dom-if" name="appearance-fonts">
         <settings-subpage page-title="$i18n{customizeFonts}">
           <settings-appearance-fonts-page prefs="{{prefs}}">
           </settings-appearance-fonts-page>
         </settings-subpage>
       </template>
     </settings-animated-pages>
   </template>
   <script src="appearance_page.js"></script>
 </dom-module>