Remove references to IsNewAvatarMenu since the flag was removed.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index f23f18542f51ede9de4c8bd49ec8c346e414c4a1..0e10280a9a1066c49f12dae1006f08739174576a 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -378,12 +378,6 @@ Profile* CreatePrimaryProfile(const content::MainFunctionParams& parameters,
   base::FilePath profile_path =
       GetStartupProfilePath(user_data_dir, parsed_command_line);
 
-  // Without NewAvatarMenu, replace guest with any existing profile.
-  if (!switches::IsNewAvatarMenu() &&
-      profile_path == ProfileManager::GetGuestProfilePath()) {
-    profile_path = g_browser_process->profile_manager()->GetProfileInfoCache().
-        GetPathOfProfileAtIndex(0);
-  }
   profile = g_browser_process->profile_manager()->GetProfile(
       profile_path);