Change some roles to "button" instead of "link" where it'd benefit users of

chrome/browser/resources/local_discovery/local_discovery.html

Index: chrome/browser/resources/local_discovery/local_discovery.html
diff --git a/chrome/browser/resources/local_discovery/local_discovery.html b/chrome/browser/resources/local_discovery/local_discovery.html
index 787e30dfa21df43b87e903420e56bd5aadb9d0ed..f0d3cb5ebcd1f5a36733b7c953f21b24c467bda2 100644
--- a/chrome/browser/resources/local_discovery/local_discovery.html
+++ b/chrome/browser/resources/local_discovery/local_discovery.html
@@ -101,7 +101,7 @@
     </div>
 
     <header>
-      <a is="action-link" id="back-button" hidden>
+      <a is="action-link" id="back-link" hidden>
         <span i18n-content="backButton"></span>
       </a>
       <h1 i18n-content="devicesTitle"></h1>
@@ -113,7 +113,7 @@
       <div id="register-login-promo" class="login-promo cloud-print-message"
            hidden>
         <span i18n-content="registerNeedLogin"></span>
-        <a is="action-link" id="register-login-button"
+        <a is="action-link" id="register-login-link"
             i18n-content="cloudDevicesLogin"></a>
       </div>
       <div id="no-printers-message"
@@ -145,13 +145,13 @@
     <div id="cloud-devices-login-promo" class="login-promo cloud-print-message"
          hidden>
       <span i18n-content="cloudDevicesNeedLogin"></span>
-      <a is="action-link" id="cloud-devices-login-button"
+      <a is="action-link" id="cloud-devices-login-link"
           i18n-content="cloudDevicesLogin"></a>
     </div>
     <div id="cloud-devices-unavailable"
          class="cloud-print-message" hidden>
       <span i18n-content="cloudDevicesUnavailable"></span>
-      <a is="action-link" id="cloud-devices-retry-button"
+      <a is="action-link" role="button" id="cloud-devices-retry-link"
           i18n-content="retryLoadCloudDevices"></a>
     </div>
     <div id="cloud-devices">