Fix fast user switcher appearance when empty.

chrome/browser/ui/cocoa/profiles/avatar_base_controller.mm

 // Copyright 2014 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.
 
 #import "chrome/browser/ui/cocoa/profiles/avatar_base_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile_info_cache_observer.h"
@@ skipping 169 matching lines @@
                               NSMaxY([anchor bounds]) - kMenuYOffsetAdjust);
   point = [anchor convertPoint:point toView:nil];
   point = [[anchor window] convertBaseToScreen:point];
 
   // |menuController_| will automatically release itself on close.
   if (switches::IsNewAvatarMenu()) {
     profiles::BubbleViewMode viewMode;
     profiles::TutorialMode tutorialMode;
     profiles::BubbleViewModeFromAvatarBubbleMode(
         mode, &viewMode, &tutorialMode);
+    // 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 creation of an empty container.
+    if (viewMode == profiles::BUBBLE_VIEW_MODE_FAST_PROFILE_CHOOSER &&
+        g_browser_process->profile_manager()->GetNumberOfProfiles() <= 1) {
+      return;
+    }
+
     menuController_ =
         [[ProfileChooserController alloc] initWithBrowser:browser_
                                                anchoredAt:point
                                                  viewMode:viewMode
                                              tutorialMode:tutorialMode
                                               serviceType:serviceType];
   } else {
     menuController_ =
       [[AvatarMenuBubbleController alloc] initWithBrowser:browser_
                                                anchoredAt:point];
@@ skipping 36 matching lines @@
 }
 
 - (void)updateErrorStatus:(BOOL)hasError {
 }
 
 - (BaseBubbleController*)menuController {
   return menuController_;
 }
 
 @end