MD Settings: Update some ChromeOS inputs to on-change

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

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.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/md_select_css.html">
 <link rel="import" href="chrome://resources/html/polymer.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-input/paper-input-container.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input.html">
@@ skipping 92 matching lines @@
       </div>
     </div>
 
     <!-- Autoconfiguration (PAC) -->
     <div class="settings-box continuation indent"
         hidden$="[[!matches_(proxy_.Type, ProxySettingsType_.PAC)]]">
       <div>$i18n{networkProxyAutoConfig}</div>
       <paper-input no-label-float class="middle flex" value="{{proxy_.PAC}}"
           disabled="[[!isEditable_('PAC', networkProperties, editable,
               useSharedProxies_)]]"
-          on-blur="onPACChange_">
+          on-change="onPACChange_">
       </paper-input>
     </div>
 
     <!-- Web Proxy Auto Discovery (WPAD) -->
     <div class="settings-box continuation indent"
         hidden$="[[!matches_(proxy_.Type, ProxySettingsType_.WPAD)]]">
       <div>$i18n{networkSectionWpad}</div>
       <div class="middle flex">[[WPAD_]]</div>
     </div>
 
@@ skipping 84 matching lines @@
         </paper-button>
         <paper-button class="action-button"
             on-tap="onAllowSharedDialogConfirm_">
           $i18n{confirm}
         </paper-button>
       </div>
     </dialog>
   </template>
   <script src="network_proxy.js"></script>
 </dom-module>