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

chrome/browser/ui/views/profiles/new_avatar_menu_button_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 "base/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profiles_state.h"
@@ skipping 13 matching lines @@
 #include "content/public/test/test_utils.h"
 #include "ui/views/controls/button/label_button.h"
 
 class NewAvatarMenuButtonTest : public InProcessBrowserTest {
  public:
   NewAvatarMenuButtonTest();
   ~NewAvatarMenuButtonTest() override;
 
  protected:
   void SetUp() override;
-  void SetUpCommandLine(CommandLine* command_line) override;
+  void SetUpCommandLine(base::CommandLine* command_line) override;
   void CreateTestingProfile();
   void StartAvatarMenu();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NewAvatarMenuButtonTest);
 };
 
 NewAvatarMenuButtonTest::NewAvatarMenuButtonTest() {
 }
 
 NewAvatarMenuButtonTest::~NewAvatarMenuButtonTest() {
 }
 
 void NewAvatarMenuButtonTest::SetUp() {
   InProcessBrowserTest::SetUp();
   DCHECK(switches::IsNewAvatarMenu());
 }
 
-void NewAvatarMenuButtonTest::SetUpCommandLine(CommandLine* command_line) {
+void NewAvatarMenuButtonTest::SetUpCommandLine(
+    base::CommandLine* command_line) {
   switches::EnableNewAvatarMenuForTesting(command_line);
 }
 
 void NewAvatarMenuButtonTest::CreateTestingProfile() {
   ProfileManager* profile_manager = g_browser_process->profile_manager();
   EXPECT_EQ(1u, profile_manager->GetNumberOfProfiles());
 
   // Sign in the default profile
   ProfileInfoCache& cache = profile_manager->GetProfileInfoCache();
   cache.SetUserNameOfProfileAtIndex(0, base::UTF8ToUTF16("user_name"));
@@ skipping 67 matching lines @@
   window_close_observer.Wait();  // Rely on test timeout for failure indication.
   EXPECT_TRUE(browser_list->empty());
 
   // If the User Manager hasn't shown yet, wait for it to show up.
   if (!UserManager::IsShowing())
     base::MessageLoop::current()->RunUntilIdle();
 
   // We need to hide the User Manager or else the process can't die.
   UserManager::Hide();
 }