MD History: Delete Grouped History

chrome/browser/resources/md_history/history_item.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/cr/ui/focus_row.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/shadow.html">
 <link rel="import" href="chrome://resources/html/icon.html">
 <link rel="import" href="chrome://resources/html/util.html">
 <link rel="import" href="chrome://history/browser_service.html">
 <link rel="import" href="chrome://history/constants.html">
 <link rel="import" href="chrome://history/searched_label.html">
@@ skipping 11 matching lines @@
       }
 
       /** Unresolved paper-icon-button-light styles. */
       button {
         background: none;
         border: none;
         outline: none;
         padding: 0;
       }
 
-      :host(:not([embedded])) #main-container {
+      #main-container {
         position: relative;
       }
 
       :host([is-card-end]) #main-container {
         margin-bottom: var(--card-padding-between);
       }
 
       :host([is-card-start][is-card-end]) #main-container {
         border-radius: 2px;
       }
@@ skipping 133 matching lines @@
       #background {
         @apply(--shadow-elevation-2dp);
         background: #fff;
         bottom: 0;
         left: 0;
         position: absolute;
         right: 0;
         top: 0;
       }
 
-      :host([embedded]) #background {
-        display: none;
-      }
-
       :host(:not([is-card-start])) #background {
         top: -5px; /* Draw the box shadow up the full edge of the background. */
       }
 
       :host([is-card-start]) #background {
         border-radius: 2px 2px 0 0;
       }
 
       :host([is-card-end]) #background {
         border-radius: 0 0 2px 2px;
@@ skipping 48 matching lines @@
           <div></div>
           <div></div>
           <div></div>
         </button>
       </div>
       <div id="time-gap-separator" hidden="[[!hasTimeGap]]"></div>
     </div>
   </template>
   <script src="chrome://history/history_item.js"></script>
 </dom-module>