Fix downloads-related web_dev_style presubmit issues.

chrome/browser/resources/md_downloads/item_view.html

 <dom-module id="item-view">
   <template>
     <div id="date-container" hidden$="{{hideDate}}">
       <div id="since"></div>
       <div id="date"></div>
     </div>
 
     <div id="safe" hidden$="{{isDangerous}}">
       <div id="progress"></div>
       <img id="safe-icon" alt="">
       <div id="title-area">
         <a is="action-link" id="file-link" column-type="name"></a>
         <span id="name"></span>
         <span id="status"></span>
       </div>
       <div>
         <a id="src-url" target="_blank" column-type="url"></a>
       </div>
       <div>
         <a is="action-link" id="show" column-type="show"
-            i18n-content="control_showinfolder"></a>
-        <a id="retry" column-type="retry" i18n-content="control_retry"
+            i18n-content="controlShowInFolder"></a>
+        <a id="retry" column-type="retry" i18n-content="controlRetry"
             download></a>
         <a is="action-link" id="pause" column-type="pause"
-            i18n-content="control_pause"></a>
+            i18n-content="controlPause"></a>
         <a is="action-link" id="resume" column-type="resume"
-            i18n-content="control_resume"></a>
+            i18n-content="controlResume"></a>
         <a is="action-link" id="safe-remove" column-type="remove"
-            i18n-content="control_removefromlist"></a>
+            i18n-content="controlRemoveFromList"></a>
         <a is="action-link" id="cancel" column-type="cancel"
-            i18n-content="control_cancel"></a>
+            i18n-content="controlCancel"></a>
         <span id="controlled-by"
-            i18n-values=".innerHTML:control_by_extension"></span>
+            i18n-values=".innerHTML:controlByExtension"></span>
       </div>
     </div>
 
     <div id="dangerous" hidden$="{{!isDangerous}}">
       <img id="dangerous-icon" alt="">
       <div id="description"></div>
       <div id="malware-controls" hidden$="{{!isMalware}}">
         <a is="action-link" id="restore" column-type="save"
-            i18n-content="danger_restore"></a>
+            i18n-content="dangerRestore"></a>
         <a is="action-link" id="dangerous-remove" column-type="discard"
-            i18n-content="control_removefromlist"></a>
+            i18n-content="controlRemoveFromList"></a>
       </div>
-      <button id="save" column-type="save" i18n-content="danger_save"
+      <button id="save" column-type="save" i18n-content="dangerSave"
           hidden$="{{isMalware}}"></button>
-      <button id="discard" column-type="discard" i18n-content="danger_discard"
+      <button id="discard" column-type="discard" i18n-content="dangerDiscard"
           hidden$="{{isMalware}}"></button>
     </div>
   </template>
   <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://downloads/constants.html">
   <link rel="import" href="chrome://downloads/throttled_icon_loader.html">
   <script src="chrome://downloads/item_view.js"></script>
 </dom-module>