Moving mediaplayer to the chrome filebrowser. Observable behaviour should not change.

chrome/browser/resources/file_manager/js/file_manager.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.
 
 // WK Bug 55728 is fixed on the chrome 12 branch but not on the trunk.
 // TODO(rginda): Enable this everywhere once we have a trunk-worthy fix.
 const ENABLE_EXIF_READER = navigator.userAgent.match(/chrome\/12\.0/i);
 
 // Thumbnail view is painful without the exif reader.
 const ENABLE_THUMBNAIL_VIEW = ENABLE_EXIF_READER;
@@ skipping 1491 matching lines @@
    * Handle a double-click event on an entry in the detail list.
    *
    * @param {Event} event The click event.
    */
   FileManager.prototype.onDetailDoubleClick_ = function(event) {
     if (this.renameInput_.currentEntry) {
       // Don't pay attention to double clicks during a rename.
       return;
     }
 
-    var i = this.currentList_.selectionModel.leadIndex;
-    var entry = this.dataModel_.item(i);
+    var entry = this.selection.leadEntry;
+    if (!entry) {
+      console.log('Invalid selection');
+      return;
+    }
 
     if (entry.isDirectory)
       return this.changeDirectory(entry.fullPath);
 
     if (!this.okButton_.disabled)
       this.onOk_();
 
   };
 
   /**
@@ skipping 472 matching lines @@
     } else if (this.dialogType_ == FileManager.DialogType.SELECT_OPEN_FILE) {
       if (!this.selection.leadEntry.isFile)
         throw new Error('Selected entry is not a file!');
     }
 
     chrome.fileBrowserPrivate.selectFile(ary[0], 0);
     window.close();
   };
 
 })();