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

chrome/browser/profiles/profile_browsertest.cc

 // Copyright (c) 2012 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/profiles/profile.h"
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_reader.h"
@@ skipping 74 matching lines @@
   // (see crbug.com/88586).
   content::RunAllPendingInMessageLoop();
   content::RunAllPendingInMessageLoop(content::BrowserThread::DB);
   content::RunAllPendingInMessageLoop(content::BrowserThread::FILE);
 }
 
 }  // namespace
 
 class ProfileBrowserTest : public InProcessBrowserTest {
  protected:
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
 #if defined(OS_CHROMEOS)
     command_line->AppendSwitch(
         chromeos::switches::kIgnoreUserProfileMappingForTests);
 #endif
   }
 
   scoped_ptr<Profile> CreateProfile(
       const base::FilePath& path,
       Profile::Delegate* delegate,
       Profile::CreateMode create_mode) {
@@ skipping 285 matching lines @@
     ASSERT_EQ(GetExitTypePreferenceFromDisk(profile), "SessionEnded");
 
     // Mark the success.
     succeeded = true;
   }
 
   ASSERT_TRUE(succeeded) << "profile->EndSession() timed out too often.";
 }
 
 #endif  // defined(USE_X11) || defined(OS_WIN)