Added a link to the downloads tab that opens the downloads folder.

chrome/browser/resources/downloads.js

 // Copyright (c) 2011 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.
 
 ///////////////////////////////////////////////////////////////////////////////
 // Helper functions
 function $(o) {return document.getElementById(o);}
 
 /**
  * Sets the display style of a node.
@@ skipping 557 matching lines @@
 }
 
 function clearAll() {
   fifo_results.length = 0;
   downloads.clear();
   downloads.setSearchText('');
   chrome.send('clearAll', []);
   return false;
 }
 
+function openDownloadsFolder() {
+  chrome.send('openDownloadsFolder');
+  return false;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // Chrome callbacks:
 /**
  * Our history system calls this function with results from searches or when
  * downloads are added or removed.
  */
 function downloadsList(results) {
   if (resultsTimeout)
     clearTimeout(resultsTimeout);
   fifo_results.length = 0;
@@ skipping 27 matching lines @@
     if (Date.now() - start > 50) {
       clearTimeout(resultsTimeout);
       resultsTimeout = setTimeout(tryDownloadUpdatedPeriodically, 5);
       break;
     }
   }
 }
 
 // Add handlers to HTML elements.
 document.body.onload = load;
+
 var clearAllLink = $('clear-all');
 clearAllLink.onclick = function () { clearAll(''); };
 clearAllLink.oncontextmenu = function() { return false; };
 
+var openDownloadsFolderLink = $('open-downloads-folder');
+openDownloadsFolderLink.onclick = openDownloadsFolder;
+openDownloadsFolderLink.oncontextmenu = function() { return false; };
+
 $('search-link').onclick = function () {
   setSearch('');
   return false;
 };
 $('search-form').onsubmit = function () {
   setSearch(this.term.value);
   return false;
 };
-