MD Downloads: update "expanded" (i.e. in progress) cards

chrome/browser/resources/md_downloads/item.html

 <link rel="import" href="chrome://resources/html/action_link.html">
 <link rel="import" href="chrome://resources/html/cr.html">
 <link rel="import" href="chrome://resources/html/load_time_data.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-material/paper-material.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-progress/paper-progress.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_button/cr_button.html">
 <link rel="import" href="chrome://downloads/action_service.html">
 <link rel="import" href="chrome://downloads/constants.html">
 <link rel="import" href="chrome://downloads/throttled_icon_loader.html">
 
 <dom-module id="downloads-item">
   <template>
     <div id="date-container">
       <div id="since"></div>
       <div id="date"></div>
     </div>
 
     <paper-material id="content" on-dragstart="onDragStart_">
-      <div class="icon-wrapper">
+      <div id="file-icon-wrapper" class="icon-wrapper">
         <img class="icon" id="file-icon" alt="" hidden="[[isDangerous_]]">
         <div class="icon" id="warning" hidden="[[!isDangerous_]]"></div>
       </div>
 
       <div id="details">
         <div id="title-area"><!-- Can't have any line breaks.
           --><a is="action-link" id="file-link" focus-type="name"
               on-click="onFileLinkClick_"></a><!-- Before #name.
           --><span id="name"></span>
           <span id="tag"></span>
@@ skipping 52 matching lines @@
     </paper-material>
 
     <div id="end-cap"></div>
 
   </template>
   <link rel="import" type="css" href="chrome://resources/css/action_link.css">
   <link rel="import" type="css" href="chrome://downloads/shared_style.css">
   <link rel="import" type="css" href="chrome://downloads/item.css">
   <script src="chrome://downloads/item.js"></script>
 </dom-module>