Add <a is="action-link">, a web component extension of <a> for in-page actions.

chrome/browser/resources/extensions/extension_error.html

Index: chrome/browser/resources/extensions/extension_error.html
diff --git a/chrome/browser/resources/extensions/extension_error.html b/chrome/browser/resources/extensions/extension_error.html
index 1e90aece98b9d426e24a66f5c5b29e33ed4a6e10..041994b241b609cb475002f4eb3727e04dbade26 100644
--- a/chrome/browser/resources/extensions/extension_error.html
+++ b/chrome/browser/resources/extensions/extension_error.html
@@ -7,13 +7,11 @@ in the LICENSE file.
   <div class="extension-error-list">
     <ul class="extension-error-list-contents"></ul>
     <div class="extension-error-list-show-more">
-      <button class="link-button"
-              i18n-content="extensionErrorsShowMore" hidden>
-      </button>
+      <a is="action-link" i18n-content="extensionErrorsShowMore" hidden></a>
     </div>
   </div>
   <div class="extension-error-metadata">
     <span class="extension-error-message"></span>
-    <button class="extension-error-view-details link-button"></button>
+    <a is="action-link" class="extension-error-view-details"></a>
   </div>
 </div>