[Resumption 12/12] Support resuming interrupted downloads from the downloads page.

chrome/browser/resources/downloads/downloads.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // TODO(jhawkins): Use hidden instead of showInline* and display:none.
 
 /**
  * Sets the display style of a node.
  * @param {!Element} node The target element to show or hide.
  * @param {boolean} isShow Should the target element be visible.
@@ skipping 493 matching lines @@
     }
 
     if (this.controlShow_) {
       showInline(this.controlShow_,
                  this.state_ == Download.States.COMPLETE &&
                      !this.fileExternallyRemoved_);
     }
     showInline(this.controlRetry_, download.retry);
     this.controlRetry_.href = this.url_;
     showInline(this.controlPause_, this.state_ == Download.States.IN_PROGRESS);
-    showInline(this.controlResume_, this.state_ == Download.States.PAUSED);
+    showInline(this.controlResume_, download.resume);
     var showCancel = this.state_ == Download.States.IN_PROGRESS ||
                      this.state_ == Download.States.PAUSED;
     showInline(this.controlCancel_, showCancel);
     showInline(this.controlRemove_, !showCancel);
 
     this.nodeSince_.textContent = this.since_;
     this.nodeDate_.textContent = this.date_;
     // Don't unnecessarily update the url, as doing so will remove any
     // text selection the user has started (http://crbug.com/44982).
     if (this.nodeURL_.textContent != this.url_) {
@@ skipping 259 matching lines @@
     if (Date.now() - start > 50) {
       clearTimeout(resultsTimeout);
       resultsTimeout = setTimeout(tryDownloadUpdatedPeriodically, 5);
       break;
     }
   }
 }
 
 // Add handlers to HTML elements.
 window.addEventListener('DOMContentLoaded', load);