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

chrome/browser/chromeos/login/test/oobe_base_test.cc

Index: chrome/browser/chromeos/login/test/oobe_base_test.cc
diff --git a/chrome/browser/chromeos/login/test/oobe_base_test.cc b/chrome/browser/chromeos/login/test/oobe_base_test.cc
index e96e0a4164153f4694471e61c6d4a73ee51f8708..544f74ed3dcfba2659c5a0ba15db6a02eb13764c 100644
--- a/chrome/browser/chromeos/login/test/oobe_base_test.cc
+++ b/chrome/browser/chromeos/login/test/oobe_base_test.cc
@@ -80,7 +80,7 @@ void OobeBaseTest::TearDownOnMainThread() {
   ExtensionApiTest::TearDownOnMainThread();
 }
 
-void OobeBaseTest::SetUpCommandLine(CommandLine* command_line) {
+void OobeBaseTest::SetUpCommandLine(base::CommandLine* command_line) {
   ExtensionApiTest::SetUpCommandLine(command_line);
   command_line->AppendSwitch(chromeos::switches::kLoginManager);
   command_line->AppendSwitch(chromeos::switches::kForceLoginManagerInTests);