MD Settings: In /syncSetup clicking links in checkbox label should not check/uncheck.

chrome/browser/resources/settings/people_page/sync_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/html/web_ui_listener_behavior.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-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-radio-button/paper-radio-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-radio-group/paper-radio-group.html">
 <link rel="import" href="/people_page/sync_browser_proxy.html">
 <link rel="import" href="/route.html">
@@ skipping 123 matching lines @@
 
         <!-- The Payments integration checkbox is a special case in many ways.
              It's visible only if autofill is registered. It's disabled and
              unchecked if autofill is unchecked.-->
         <paper-checkbox checked="{{syncPrefs.paymentsIntegrationEnabled}}"
             on-change="onSingleSyncDataTypeChanged_" class="list-item"
             hidden="[[!syncPrefs.autofillRegistered]]"
             disabled="[[shouldPaymentsCheckboxBeDisabled_(
                 syncPrefs.syncAllDataTypes, syncPrefs.autofillSynced)]]">
           $i18n{enablePaymentsIntegrationCheckboxLabel}
-          <a href="$i18nRaw{autofillHelpURL}" target="_blank">
+          <a href="$i18nRaw{autofillHelpURL}" target="_blank" 
+              id="paymentLearnMore" on-tap="stopPropagation_">

[dpapad, 2016/11/19 02:04:38]

Nit: on-tap="onLearnMoreTap_"

[scottchen, 2016/11/21 18:33:46]

Done.

             $i18n{learnMore}
           </a>
         </paper-checkbox>
       </div>
 
       <div class="settings-box two-line single-column" actionable
           on-tap="onManageSyncedDataTap_">
         <div>$i18n{manageSyncedDataTitle}</div>
         <div class="secondary">$i18n{manageSyncedDataDescription}</div>
       </div>
@@ skipping 79 matching lines @@
           </div>
           <div id="passphraseRecoverHint" class="list-item">
             <span>$i18nRaw{passphraseRecover}</span>
           </div>
         </div>
       </template>
     </div>
   </template>
   <script src="sync_page.js"></script>
 </dom-module>