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

chrome/browser/ui/settings_window_manager_browsertest.cc

 // Copyright 2014 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/ui/settings_window_manager.h"
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 41 matching lines @@
  public:
   SettingsWindowManagerTest()
       : settings_manager_(chrome::SettingsWindowManager::GetInstance()),
         test_profile_(NULL) {
     settings_manager_->AddObserver(&observer_);
   }
   ~SettingsWindowManagerTest() override {
     settings_manager_->RemoveObserver(&observer_);
   }
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(::switches::kEnableSettingsWindow);
   }
 
   Profile* CreateTestProfile() {
     CHECK(!test_profile_);
 
     ProfileManager* profile_manager = g_browser_process->profile_manager();
     base::RunLoop run_loop;
     profile_manager->CreateProfileAsync(
         profile_manager->GenerateNextProfileDirectoryPath(),
@@ skipping 133 matching lines @@
   EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
 
   // Downloads should open in an existing browser window.
   chrome::ShowDownloads(browser());
   EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
 
   // About should open a new browser window.
   chrome::ShowAboutChrome(browser());
   EXPECT_EQ(2u, chrome::GetTotalBrowserCount());
 }