Fixing spacing around [+] icon in system menu

BUG=386982
TEST=VISUAL

Review URL: https://codereview.chromium.org/379253004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282406 0039d316-1c4b-4281-b951-d872f2087c98

ash/system/user/user_view.cc

@@ -174,10 +174,7 @@ void AddUserView::AddContent() {
 
   add_user_ = new views::View;
   add_user_->SetBorder(views::Border::CreateEmptyBorder(
-      kTrayPopupUserCardVerticalPadding,
-      kTrayPopupPaddingHorizontal - kTrayUserTileHoverBorderInset,
-      kTrayPopupUserCardVerticalPadding,
-      kTrayPopupPaddingHorizontal - kTrayUserTileHoverBorderInset));
+      0, kTrayUserTileHoverBorderInset, 0, 0));
 
   add_user_->SetLayoutManager(new views::BoxLayout(
       views::BoxLayout::kHorizontal, 0, 0, kTrayPopupPaddingBetweenItems));