Fix fast user switcher appearance when empty.

chrome/browser/ui/views/profiles/profile_chooser_view.cc

Index: chrome/browser/ui/views/profiles/profile_chooser_view.cc
diff --git a/chrome/browser/ui/views/profiles/profile_chooser_view.cc b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
index 296028e87a506f759d2c6baeec28f9476d33fa5a..7f7b143d40bbc2320a8cf6fca4039eb053519fbf 100644
--- a/chrome/browser/ui/views/profiles/profile_chooser_view.cc
+++ b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
@@ -494,6 +494,14 @@ void ProfileChooserView::ShowBubble(
     views::BubbleBorder::Arrow arrow,
     views::BubbleBorder::BubbleAlignment border_alignment,
     Browser* browser) {
+  // Don't start creating the view if it would be an empty fast user switcher.
+  // This is the case when there is 0 or 1 profiles (the current one).  It has
+  // to happen here to prevent the view system from creating an empty container.
+  if (view_mode == profiles::BUBBLE_VIEW_MODE_FAST_PROFILE_CHOOSER &&
+      g_browser_process->profile_manager()->GetNumberOfProfiles() <= 1) {
+    return;
+  }
+
   if (IsShowing()) {
     if (tutorial_mode != profiles::TUTORIAL_MODE_NONE) {
       profile_bubble_->tutorial_mode_ = tutorial_mode;