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

chrome/browser/ui/sync/profile_signin_confirmation_helper_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/ui/sync/profile_signin_confirmation_helper.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/run_loop.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "content/public/test/test_launcher.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class ProfileSigninConfirmationHelperBrowserTest : public InProcessBrowserTest {
  public:
   ProfileSigninConfirmationHelperBrowserTest() {}
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     // Force the first-run flow to trigger autoimport.
     InProcessBrowserTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kForceFirstRun);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ProfileSigninConfirmationHelperBrowserTest);
 };
 
 // http://crbug.com/321302
@@ skipping 13 matching lines @@
 // http://crbug.com/321302
 #if defined(GOOGLE_CHROME_BUILD) && (defined(OS_MACOSX) || defined(OS_LINUX))
 #define MAYBE_HasNoSyncedExtensions DISABLED_HasNoSyncedExtensions
 #else
 #define MAYBE_HasNoSyncedExtensions HasNoSyncedExtensions
 #endif
 IN_PROC_BROWSER_TEST_F(ProfileSigninConfirmationHelperBrowserTest,
                        MAYBE_HasNoSyncedExtensions) {
   EXPECT_FALSE(ui::HasSyncedExtensions(browser()->profile()));
 }