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

chrome/browser/extensions/external_provider_impl_chromeos_unittest.cc

 // Copyright 2013 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 "chrome/browser/extensions/external_provider_impl.h"
 
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/testing_pref_service.h"
 #include "base/test/scoped_path_override.h"
@@ skipping 79 matching lines @@
   service_->CheckForExternalUpdates();
   content::WindowedNotificationObserver(
       extensions::NOTIFICATION_CRX_INSTALLER_DONE,
       content::NotificationService::AllSources()).Wait();
 
   EXPECT_TRUE(service_->GetInstalledExtension(kExternalAppId));
 }
 
 // App mode, no external app should be installed.
 TEST_F(ExternalProviderImplChromeOSTest, AppMode) {
-  CommandLine* command = CommandLine::ForCurrentProcess();
+  base::CommandLine* command = base::CommandLine::ForCurrentProcess();
   command->AppendSwitchASCII(switches::kForceAppMode, std::string());
   command->AppendSwitchASCII(switches::kAppId, std::string("app_id"));
 
   InitServiceWithExternalProviders();
 
   service_->CheckForExternalUpdates();
   base::RunLoop().RunUntilIdle();
 
   EXPECT_FALSE(service_->GetInstalledExtension(kExternalAppId));
 }
 
 }  // namespace extensions