MD History: Fix broken sync status dropdown

chrome/browser/resources/md_history/lazy_load.vulcanized.html

Index: chrome/browser/resources/md_history/lazy_load.vulcanized.html
diff --git a/chrome/browser/resources/md_history/lazy_load.vulcanized.html b/chrome/browser/resources/md_history/lazy_load.vulcanized.html
index 480e5827884b048d45bd2662bd0afe396d5ea30b..bd024750f09f6cf67c21b6e990e95d234181af70 100644
--- a/chrome/browser/resources/md_history/lazy_load.vulcanized.html
+++ b/chrome/browser/resources/md_history/lazy_load.vulcanized.html
@@ -1197,6 +1197,60 @@ paper-icon-button.subpage-arrow {
   </template>
 
   </dom-module>
+<dom-module id="iron-overlay-backdrop" assetpath="chrome://resources/polymer/v1_0/iron-overlay-behavior/" css-build="shadow">
+
+  <template>
+    <style scope="iron-overlay-backdrop">:host {
+  position: fixed;
+        top: 0;
+        left: 0;
+        width: 100%;
+        height: 100%;
+        background-color: var(--iron-overlay-backdrop-background-color, #000);
+        opacity: 0;
+        transition: opacity 0.2s;
+        pointer-events: none;
+        ;
+}
+
+:host(.opened) {
+  opacity: var(--iron-overlay-backdrop-opacity, 0.6);
+        pointer-events: auto;
+        ;
+}
+
+</style>
+
+    <content></content>
+  </template>
+
+</dom-module>
+
+<script src="chrome://resources/polymer/v1_0/web-animations-js/web-animations-next-lite.min.js"></script>
+
+
+<dom-module id="iron-dropdown" assetpath="chrome://resources/polymer/v1_0/iron-dropdown/" css-build="shadow">
+  <template>
+    <style scope="iron-dropdown">:host {
+  position: fixed;
+}
+
+#contentWrapper ::content > * {
+  overflow: auto;
+}
+
+#contentWrapper.animating ::content > * {
+  overflow: hidden;
+}
+
+</style>
+
+    <div id="contentWrapper">
+      <content id="content" select=".dropdown-content"></content>
+    </div>
+  </template>
+
+  </dom-module>
 <dom-module id="paper-tab" assetpath="chrome://resources/polymer/v1_0/paper-tabs/" css-build="shadow">
   <template>
     <style scope="paper-tab">:host {