Make callers of CommandLine use it via the base:: namespace.

chrome/browser/ui/webui/flags_ui.cc

Index: chrome/browser/ui/webui/flags_ui.cc
diff --git a/chrome/browser/ui/webui/flags_ui.cc b/chrome/browser/ui/webui/flags_ui.cc
index d586c827abe485ac264f2505679bcb81af41227e..18e67607e0e21658998502e96727824738cc8d39 100644
--- a/chrome/browser/ui/webui/flags_ui.cc
+++ b/chrome/browser/ui/webui/flags_ui.cc
@@ -222,12 +222,12 @@ void FlagsDOMHandler::HandleRestartBrowser(const base::ListValue* args) {
 #if defined(OS_CHROMEOS)
   // On ChromeOS be less intrusive and restart inside the user session after
   // we apply the newly selected flags.
-  CommandLine user_flags(CommandLine::NO_PROGRAM);
+  base::CommandLine user_flags(base::CommandLine::NO_PROGRAM);
   about_flags::ConvertFlagsToSwitches(flags_storage_.get(),
                                       &user_flags,
                                       about_flags::kAddSentinels);
-  CommandLine::StringVector flags;
-  // argv[0] is the program name |CommandLine::NO_PROGRAM|.
+  base::CommandLine::StringVector flags;
+  // argv[0] is the program name |base::CommandLine::NO_PROGRAM|.
   flags.assign(user_flags.argv().begin() + 1, user_flags.argv().end());
   VLOG(1) << "Restarting to apply per-session flags...";
   chromeos::DBusThreadManager::Get()