Filebrowser: keep selection when switching between list and grid.

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_METADATA = true;
 
 // Thumbnail view is painful without the exif reader.
 const ENABLE_THUMBNAIL_VIEW = ENABLE_METADATA;
@@ skipping 626 matching lines @@
          this.currentDirEntry_.fullPath != '/' &&
          // Not in media directory.
          this.currentDirEntry_.fullPath != MEDIA_DIRECTORY);
   };
 
   FileManager.prototype.setListType = function(type) {
     if (type && type == this.listType_)
       return;
 
     if (type == FileManager.ListType.DETAIL) {
+      var selectedIndexes = this.grid_.selectionModel.selectedIndexes;
       this.table_.dataModel = this.dataModel_;
       this.table_.style.display = '';
       this.grid_.style.display = 'none';
       this.grid_.dataModel = this.emptyDataModel_;
       this.currentList_ = this.table_;
       this.dialogDom_.querySelector('button.detail-view').disabled = true;
       this.dialogDom_.querySelector('button.thumbnail-view').disabled = false;
+      this.table_.selectionModel.selectedIndexes = selectedIndexes;
     } else if (type == FileManager.ListType.THUMBNAIL) {
+      var selectedIndexes = this.table_.selectionModel.selectedIndexes;
       this.grid_.dataModel = this.dataModel_;
       this.grid_.style.display = '';
       this.table_.style.display = 'none';
       this.table_.dataModel = this.emptyDataModel_;
       this.currentList_ = this.grid_;
       this.dialogDom_.querySelector('button.thumbnail-view').disabled = true;
       this.dialogDom_.querySelector('button.detail-view').disabled = false;
+      this.grid_.selectionModel.selectedIndexes = selectedIndexes;
     } else {
       throw new Error('Unknown list type: ' + type);
     }
 
     this.listType_ = type;
     this.onResize_();
   };
 
   /**
    * Initialize the file thumbnail grid.
@@ skipping 1661 matching lines @@
       window.alert(str('ERROR_WHITESPACE_NAME'));
       return false;
     }
     if (/^(CON|PRN|AUX|NUL|COM[1-9]|LPT[1-9])$/i.test(name)) {
       window.alert(str('ERROR_RESERVED_NAME'));
       return false;
     }
     return true;
   };
 })();