MD Extensions: Replace <paper-spinner> with <paper-spinner-lite>

Bug: 796661
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Id2b220521dc57cd3036dffb9f7491b8ca1823b70
Reviewed-on: https://chromium-review.googlesource.com/837504
Reviewed-by: Dave Schuyler <dschuyler@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#525520}

chrome/browser/resources/md_extensions/load_error.html

@@ -6,7 +6,7 @@
 <link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/cr.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-spinner/paper-spinner.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner-lite.html">
 <link rel="import" href="code_section.html">
 
 <dom-module id="extensions-load-error">
@@ -39,7 +39,7 @@
         </extensions-code-section>
       </div>
       <div slot="button-container">
-        <paper-spinner active="[[retrying_]]"></paper-spinner>
+        <paper-spinner-lite active="[[retrying_]]"></paper-spinner-lite>
         <paper-button class="cancel-button" on-tap="close">
           $i18n{loadErrorCancel}
         </paper-button>