MD-Settings: Adds an a11y label to most toggle buttons.

chrome/browser/resources/settings/internet_page/internet_detail_page.html

 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <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">
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_network_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_network_indicator.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-collapse/iron-collapse.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
@@ skipping 143 matching lines @@
           <div>[[i18n('networkPrimaryUserControlled', primaryUserEmail_)]]</div>
         </div>
       </div>
     </template>
     <template is="dom-if" if="[[!isSecondaryUser_]]">
       <!-- Top level properties -->
       <div class="layout vertical">
         <!-- Prefer this network. -->
         <template is="dom-if" if="[[showPreferNetwork_(networkProperties))]]">
           <div class="settings-box">
-            <div class="start">$i18n{networkPrefer}</div>
+            <div id="preferNetworkToggleLabel"class="start">
+              $i18n{networkPrefer}
+            </div>
             <cr-policy-network-indicator
                 property="[[networkProperties.Priority]]">
             </cr-policy-network-indicator>
             <paper-toggle-button checked="{{preferNetwork_}}"
                 disabled="[[isNetworkPolicyEnforced(
-                    networkProperties.Priority)]]">
+                    networkProperties.Priority)]]"
+                aria-labelledby="preferNetworkToggleLabel">
             </paper-toggle-button>
           </div>
         </template>
         <!-- Autoconnect. -->
         <template is="dom-if" if="[[showAutoConnect_(networkProperties)]]">
           <div class="settings-box">
-            <div class="start">$i18n{networkAutoConnect}</div>
+            <div id="autoConnectToggleLabel" class="start">
+              $i18n{networkAutoConnect}
+            </div>
             <cr-policy-network-indicator
                 property="[[getManagedAutoConnect_(networkProperties)]]">
             </cr-policy-network-indicator>
             <paper-toggle-button checked="{{autoConnect_}}"
                 disabled="[[!enableAutoConnect_(networkProperties,
-                          globalPolicy)]]">
+                          globalPolicy)]]"
+                aria-labelledby="autoConnectToggleLabel">
             </paper-toggle-button>
           </div>
         </template>
         <!-- SIM Info (Cellular only). -->
         <template is="dom-if" if="[[showCellularSim_(networkProperties)]]">
           <div class="settings-box single-column stretch">
             <network-siminfo
                 editable on-siminfo-change="onNetworkPropertyChange_"
                 network-properties="[[networkProperties]]"
                 networking-private="[[networkingPrivate]]">
@@ skipping 75 matching lines @@
                 on-proxy-change="onProxyChange_"
                 network-properties="[[networkProperties]]">
             </network-proxy>
           </template>
         </div>
       </iron-collapse>
     </template>
   </template>
   <script src="internet_detail_page.js"></script>
 </dom-module>