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 29c609377b1b103a0aeeca07979069a302300032..4a02401a503c1e75daec9c1fe0280094db2a9147 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);