[MD settings] css for row separator

chrome/browser/resources/settings/people_page/people_page.html

Index: chrome/browser/resources/settings/people_page/people_page.html
diff --git a/chrome/browser/resources/settings/people_page/people_page.html b/chrome/browser/resources/settings/people_page/people_page.html
index 9e488b33c636c05363aa009c9855bcf088b8f421..7cbe3f328cef1c426a8c1bd3f67eded013805dda 100644
--- a/chrome/browser/resources/settings/people_page/people_page.html
+++ b/chrome/browser/resources/settings/people_page/people_page.html
@@ -123,21 +123,19 @@
             </div>
 <if expr="not chromeos">
             <template is="dom-if" if="[[showSignin_(syncStatus)]]">
-              <span class="secondary-action">
-                <paper-button class="primary-button" on-tap="onSigninTap_"
-                    disabled="[[syncStatus.setupInProgress]]">
-                  $i18n{syncSignin}
-                </paper-button>
-              </span>
+              <div class="separator"></div>
+              <paper-button class="primary-button" on-tap="onSigninTap_"
+                  disabled="[[syncStatus.setupInProgress]]">
+                $i18n{syncSignin}
+              </paper-button>
             </template>
             <template is="dom-if" if="[[syncStatus.signedIn]]">
-              <span class="secondary-action">
-                <paper-button id="disconnectButton" class="secondary-button"
-                    on-tap="onDisconnectTap_"
-                    disabled="[[syncStatus.setupInProgress]]">
-                  $i18n{syncDisconnect}
-                </paper-button>
-              </span>
+              <div class="separator"></div>
+              <paper-button id="disconnectButton" class="secondary-button"
+                  on-tap="onDisconnectTap_"
+                  disabled="[[syncStatus.setupInProgress]]">
+                $i18n{syncDisconnect}
+              </paper-button>
             </template>
 </if>
           </template>