MD History: Replace more-vert iron-icon with styled divs.

chrome/browser/resources/md_history/history_item.html

Index: chrome/browser/resources/md_history/history_item.html
diff --git a/chrome/browser/resources/md_history/history_item.html b/chrome/browser/resources/md_history/history_item.html
index f4d17a34dd8c81656c7d88a3827e344ce4e146f6..c306acf530ee451d896d6ef052bf9c90c2a70f6a 100644
--- a/chrome/browser/resources/md_history/history_item.html
+++ b/chrome/browser/resources/md_history/history_item.html
@@ -171,9 +171,11 @@
             </template>
           </div>
           <button is="paper-icon-button-light" id="menu-button"
-              class="icon-button" title="$i18n{moreActionsButton}"
+              class="more-vert-button" title="$i18n{moreActionsButton}"
               on-tap="onMenuButtonTap_">
-            <iron-icon icon="cr:more-vert"></iron-icon>
+            <div></div>
+            <div></div>
+            <div></div>
           </button>
         </div>
         <div id="time-gap-separator" hidden="[[!hasTimeGap]]"></div>