Setting focus on the file list after click on grid/thumbnail view button.

chrome/browser/resources/file_manager/js/file_manager.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.
 
 // Setting the src of an img to an empty string can crash the browser, so we
 // use an empty 1x1 gif instead.
 
 /**
  * FileManager constructor.
  *
@@ skipping 3880 matching lines @@
     function onError(error) {
       self.alert.show(strf('ERROR_CREATING_FOLDER', current(),
                            util.getFileErrorMnemonic(error.code)));
     }
 
     tryCreate();
   };
 
   FileManager.prototype.onDetailViewButtonClick_ = function(event) {
     this.setListType(FileManager.ListType.DETAIL);
+    this.currentList_.focus();
   };
 
   FileManager.prototype.onThumbnailViewButtonClick_ = function(event) {
     this.setListType(FileManager.ListType.THUMBNAIL);
+    this.currentList_.focus();
   };
 
   /**
    * KeyDown event handler for the document.
    */
   FileManager.prototype.onKeyDown_ = function(event) {
     if (event.srcElement === this.renameInput_) {
       // Ignore keydown handler in the rename input box.
       return;
     }
@@ skipping 533 matching lines @@
 
     chrome.fileBrowserPrivate.setGDataPreferences(changeInfo);
 
     if (oldValue) {
       event.target.removeAttribute('checked');
     } else {
       event.target.setAttribute('checked', 'checked');
     }
   };
 })();