[MD History] Prevent horizontal scrolling of history views.

chrome/browser/resources/md_history/history_list.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-list/iron-list.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-scroll-threshold/iron-scroll-threshold.html">
 <link rel="import" href="chrome://history/constants.html">
 <link rel="import" href="chrome://history/history_item.html">
 <link rel="import" href="chrome://history/history_list_behavior.html">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <dom-module id="history-list">
   <template>
     <style include="shared-style">
       :host {
         display: block;
-        overflow: overlay;
+        overflow: auto;
       }
 
       #infinite-list {
         @apply(--card-container-filter);
       }
 
       history-item {
         --history-item-padding-side: var(--card-padding-side);
       }
     </style>
@@ skipping 16 matching lines @@
             index="[[index]]">
         </history-item>
       </template>
     </iron-list>
     <iron-scroll-threshold id="scroll-threshold" scroll-target="infinite-list"
         lower-threshold="500" on-lower-threshold="loadMoreData_">
     </iron-scroll-threshold>
   </template>
   <script src="chrome://history/history_list.js"></script>
 </dom-module>