When searching show spinner inplace of magnifying glass in the searchbox.

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.
 
 /**
  * FileManager constructor.
  *
  * FileManager objects encapsulate the functionality of the file selector
  * dialogs, as well as the full screen file manager application (though the
  * latter is not yet implemented).
@@ skipping 3220 matching lines @@
 
   FileManager.prototype.showSpinnerLater_ = function() {
     this.cancelSpinnerTimeout_();
     this.showSpinnerTimeout_ =
         setTimeout(this.showSpinner_.bind(this, true), 500);
   };
 
   FileManager.prototype.showSpinner_ = function(on) {
     this.cancelSpinnerTimeout_();
     if (on) {
-      this.spinner_.textContent =
-          this.directoryModel_.isSearching() ? str('SEARCH_SPINNER') : '';
-      this.spinner_.style.display = '';
+      if (this.directoryModel_.isSearching()) {
+        this.dialogContainer_.classList.add('searching');
+      } else {
+        this.spinner_.style.display = '';
+      }
     } else {
       this.spinner_.style.display = 'none';
+      if (this.dialogContainer_)
+        this.dialogContainer_.classList.remove('searching');
     }
   };
 
   FileManager.prototype.onNewFolderCommand_ = function(event) {
     var defaultName = str('DEFAULT_NEW_FOLDER_NAME');
 
     // Find a name that doesn't exist in the data model.
     var files = this.directoryModel_.getFileList();
     var hash = {};
     for (var i = 0; i < files.length; i++) {
@@ skipping 920 matching lines @@
     }
 
     var defaultActionSeparator =
         this.dialogDom_.querySelector('#default-action-separator');
 
     this.defaultActionMenuItem_.hidden = !taskItem;
     defaultActionSeparator.hidden = !taskItem;
   }
 })();