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

chrome/browser/extensions/background_app_browsertest.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/background/background_mode_manager.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/profiles/profile_manager.h"
 
 class TestBackgroundModeManager : public BackgroundModeManager {
  public:
-  TestBackgroundModeManager(CommandLine* command_line,
+  TestBackgroundModeManager(base::CommandLine* command_line,
                             ProfileInfoCache* profile_cache)
       : BackgroundModeManager(command_line, profile_cache),
         showed_background_app_installed_notification_for_test_(false) {}
 
   ~TestBackgroundModeManager() override {}
 
   void DisplayAppInstalledNotification(
       const extensions::Extension* extension) override {
     showed_background_app_installed_notification_for_test_ = true;
   }
@@ skipping 20 matching lines @@
 
 class BackgroundAppBrowserTest: public ExtensionBrowserTest {};
 
 // Tests that if we reload a background app, we don't get a popup bubble
 // telling us that a new background app has been installed.
 IN_PROC_BROWSER_TEST_F(BackgroundAppBrowserTest, ReloadBackgroundApp) {
 
   // Pass this in to the browser test.
   scoped_ptr<BackgroundModeManager> test_background_mode_manager(
       new TestBackgroundModeManager(
-          CommandLine::ForCurrentProcess(),
+          base::CommandLine::ForCurrentProcess(),
           &(g_browser_process->profile_manager()->GetProfileInfoCache())));
   g_browser_process->set_background_mode_manager_for_test(
       test_background_mode_manager.Pass());
   TestBackgroundModeManager* manager =
       reinterpret_cast<TestBackgroundModeManager*>(
           g_browser_process->background_mode_manager());
 
   // Load our background extension
   ASSERT_FALSE(
       manager->showed_background_app_installed_notification_for_test());
   const extensions::Extension* extension = LoadExtension(
       test_data_dir_.AppendASCII("background_app"));
   ASSERT_FALSE(extension == NULL);
 
   // Set the test flag to not shown.
   manager->set_showed_background_app_installed_notification_for_test(false);
 
   // Reload our background extension
   ReloadExtension(extension->id());
 
   // Ensure that we did not see a "Background extension loaded" dialog.
   EXPECT_FALSE(
       manager->showed_background_app_installed_notification_for_test());
 }