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

chrome/browser/profiles/profile_window.cc

Index: chrome/browser/profiles/profile_window.cc
diff --git a/chrome/browser/profiles/profile_window.cc b/chrome/browser/profiles/profile_window.cc
index 1b4c1317172640f3b0bf5992bb8072e08aae071f..320388f389c31804652867d0be3d406c68773c11 100644
--- a/chrome/browser/profiles/profile_window.cc
+++ b/chrome/browser/profiles/profile_window.cc
@@ -257,7 +257,7 @@ void FindOrCreateNewWindowForProfile(
   }
 
   content::RecordAction(UserMetricsAction("NewWindow"));
-  CommandLine command_line(CommandLine::NO_PROGRAM);
+  base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
   int return_code;
   StartupBrowserCreator browser_creator;
   browser_creator.LaunchBrowser(command_line, profile, base::FilePath(),
@@ -455,7 +455,7 @@ void EnableNewProfileManagementPreview(Profile* profile) {
       true);
 
   switches::EnableNewProfileManagementForTesting(
-      CommandLine::ForCurrentProcess());
+      base::CommandLine::ForCurrentProcess());
   UserManager::Show(base::FilePath(),
                     profiles::USER_MANAGER_TUTORIAL_OVERVIEW,
                     profiles::USER_MANAGER_SELECT_PROFILE_NO_ACTION);