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

chrome/browser/chromeos/login/login_utils_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/run_loop.h"
@@ skipping 28 matching lines @@
   ASSERT_TRUE(RLZTracker::GetAccessPointRlz(point, rlz));
 }
 #endif
 
 }  // namespace
 
 class LoginUtilsTest : public InProcessBrowserTest {
  public:
   LoginUtilsTest() {}
 
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  virtual void SetUpCommandLine(base::CommandLine* command_line) override {
     // Initialize the test server early, so that we can use its base url for
     // the command line flags.
     ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
 
     // Use the login manager screens and the gaia auth extension.
     command_line->AppendSwitch(switches::kLoginManager);
     command_line->AppendSwitch(switches::kForceLoginManagerInTests);
     command_line->AppendSwitchASCII(switches::kLoginProfile, "user");
     command_line->AppendSwitchASCII(::switches::kAuthExtensionPath,
                                     "gaia_auth");
@@ skipping 90 matching lines @@
                    RLZTracker::ChromeHomePage(),
                    &rlz_string),
         loop.QuitClosure());
     loop.Run();
     EXPECT_EQ(base::string16(), rlz_string);
   }
 }
 #endif
 
 }  // namespace chromeos