[Files.app] Use 'activate' event on the view-change menuitems instead of 'click' event

chrome/browser/resources/file_manager/foreground/js/file_manager.js

Index: chrome/browser/resources/file_manager/foreground/js/file_manager.js
diff --git a/chrome/browser/resources/file_manager/foreground/js/file_manager.js b/chrome/browser/resources/file_manager/foreground/js/file_manager.js
index b88f369dec543e90b5049e2bdf617e43292e571a..865682eb64acd796e16989b8098bf1c6eba352f8 100644
--- a/chrome/browser/resources/file_manager/foreground/js/file_manager.js
+++ b/chrome/browser/resources/file_manager/foreground/js/file_manager.js
@@ -809,12 +809,12 @@ var BOTTOM_MARGIN_FOR_PREVIEW_PANEL_PX = 52;
 
     this.detailViewButton_ =
         this.dialogDom_.querySelector('#detail-view');
-    this.detailViewButton_.addEventListener('click',
+    this.detailViewButton_.addEventListener('activate',
         this.onDetailViewButtonClick_.bind(this));
 
     this.thumbnailViewButton_ =
         this.dialogDom_.querySelector('#thumbnail-view');
-    this.thumbnailViewButton_.addEventListener('click',
+    this.thumbnailViewButton_.addEventListener('activate',
         this.onThumbnailViewButtonClick_.bind(this));
 
     cr.ui.ComboButton.decorate(this.taskItems_);
@@ -2785,6 +2785,11 @@ var BOTTOM_MARGIN_FOR_PREVIEW_PANEL_PX = 52;
    * @private
    */
   FileManager.prototype.onDetailViewButtonClick_ = function(event) {
+    // Stop propagate and hide the menu manually, in order to prevent the focus
+    // from being back to the button. (cf. http://crbug.com/248479)
+    event.stopPropagation();
+    this.gearButton_.hideMenu();
+
     this.setListType(FileManager.ListType.DETAIL);
     this.currentList_.focus();
   };
@@ -2794,6 +2799,11 @@ var BOTTOM_MARGIN_FOR_PREVIEW_PANEL_PX = 52;
    * @private
    */
   FileManager.prototype.onThumbnailViewButtonClick_ = function(event) {
+    // Stop propagate and hide the menu manually, in order to prevent the focus
+    // from being back to the button. (cf. http://crbug.com/248479)
+    event.stopPropagation();
+    this.gearButton_.hideMenu();
+
     this.setListType(FileManager.ListType.THUMBNAIL);
     this.currentList_.focus();
   };