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

chrome/browser/extensions/activity_log/activity_database_unittest.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 <string>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 94 matching lines @@
   db->AdviseFlush(queue_.size());
 }
 
 class ActivityDatabaseTest : public ChromeRenderViewHostTestHarness {
  protected:
   void SetUp() override {
     ChromeRenderViewHostTestHarness::SetUp();
 #if defined OS_CHROMEOS
     test_user_manager_.reset(new chromeos::ScopedTestUserManager());
 #endif
-    CommandLine command_line(CommandLine::NO_PROGRAM);
-    CommandLine::ForCurrentProcess()->AppendSwitch(
+    base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kEnableExtensionActivityLogTesting);
   }
 
   void TearDown() override {
 #if defined OS_CHROMEOS
     test_user_manager_.reset();
 #endif
     ChromeRenderViewHostTestHarness::TearDown();
   }
 
@@ skipping 150 matching lines @@
   ActivityDatabaseTestPolicy* delegate = new ActivityDatabaseTestPolicy();
   ActivityDatabase* activity_db = new ActivityDatabase(delegate);
   scoped_refptr<Action> action = new Action(
       "punky", base::Time::Now(), Action::ACTION_API_CALL, "brewster");
   action->mutable_args()->AppendString("woof");
   delegate->Record(activity_db, action);
   activity_db->Close();
 }
 
 }  // namespace extensions