MD History: Remove bookmark when clicking bookmark star

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/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.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-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.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">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <dom-module id="history-item">
   <template>
     <style include="shared-style">
       :host {
         @apply(--layout-center);
         @apply(--layout-vertical);
@@ skipping 84 matching lines @@
 
       #menu-button iron-icon {
         height: 20px;
         width: 20px;
       }
 
       #bookmark-star {
         -webkit-margin-end: 10px;
         -webkit-margin-start: 20px;
         color: rgb(68, 136, 255);
+        height: 20px;
+        visibility: hidden;
+        width: 20px;
+      }
+
+      #bookmark-star iron-icon {
         height: 16px;
-        visibility: hidden;
         width: 16px;
       }
 
       :host([starred]) #bookmark-star {
         visibility: visible;
       }
 
       #time-gap-separator {
         -webkit-border-start: 1px solid #888;
         -webkit-margin-start: 77px;
@@ skipping 10 matching lines @@
         </paper-checkbox>
         <span id="time-accessed">[[item.readableTimestamp]]</span>
         <div class="website-icon" id="icon"></div>
         <div id="title-and-domain">
           <a href="[[item.url]]" id="title" class="website-title">
             <history-searched-label title="[[cropItemTitle_(item.title)]]"
                 search-term="[[searchTerm]]"></history-searched-label>
           </a>
           <span id="domain">[[item.domain]]</span>
         </div>
-        <iron-icon icon="cr:star" id="bookmark-star"></iron-icon>
+        <button is="paper-icon-button-light" id="bookmark-star"
+            title="$i18n{removeBookmark}" on-tap="onRemoveBookmarkTap_">
+          <iron-icon icon="cr:star"></iron-icon>
+        </button>
         <button is="paper-icon-button-light" id="menu-button"
             on-tap="onMenuButtonTap_">
           <iron-icon icon="cr:more-vert"></iron-icon>
         </button>
       </div>
       <template is="dom-if" if="[[hasTimeGap]]">
         <div id="time-gap-separator"></div>
       </template>
     </div>
   </template>
   <script src="chrome://history/history_item.js"></script>
 </dom-module>