[MD settings] change button padding and placement

chrome/browser/resources/settings/people_page/people_page.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/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-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-dialog/paper-dialog.html">
 <link rel="import" href="chrome://md-settings/controls/settings_checkbox.html">
 <link rel="import" href="chrome://md-settings/people_page/sync_page.html">
 <link rel="import" href="chrome://md-settings/people_page/profile_info_browser_proxy.html">
 <link rel="import" href="chrome://md-settings/people_page/sync_browser_proxy.html">
@@ skipping 77 matching lines @@
             </span>
 </if>
 <if expr="not chromeos">
             <span id="profile-name">
               [[profileName_]]
             </span>
 </if>
           </div>
 <if expr="not chromeos">
           <template is="dom-if" if="[[!syncStatus.signedIn]]">
-            <paper-button class="action-button" on-tap="onSigninTap_"
-                disabled="[[syncStatus.setupInProgress]]">
-              $i18n{syncSignin}
-            </paper-button>
+            <span class="secondary-action">
+              <paper-button class="primary-button" on-tap="onSigninTap_"
+                  disabled="[[syncStatus.setupInProgress]]">
+                $i18n{syncSignin}
+              </paper-button>
+            </span>
           </template>
           <template is="dom-if" if="[[syncStatus.signedIn]]">
             <span class="secondary-action">
               <paper-button class="secondary-button" on-tap="onDisconnectTap_"
                   disabled="[[syncStatus.setupInProgress]]">
                 $i18n{syncDisconnect}
               </paper-button>
             </span>
           </template>
 </if>
@@ skipping 145 matching lines @@
 
 <if expr="chromeos">
     <template is="dom-if" if="[[easyUnlockEnabled_]]">
       <easy-unlock-turn-off-dialog id="easyUnlockTurnOffDialog">
       </easy-unlock-turn-off-dialog>
     </template>
 </if>
   </template>
   <script src="people_page.js"></script>
 </dom-module>