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

ash/virtual_keyboard_controller_unittest.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 "ash/virtual_keyboard_controller.h"
 
 #include "ash/shell.h"
 #include "ash/system/chromeos/virtual_keyboard/virtual_keyboard_observer.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
@@ skipping 22 matching lines @@
     manager->OnTouchscreenDevicesUpdated(touchscreen_devices);
   }
 
   void UpdateKeyboardDevices(std::vector<ui::KeyboardDevice> keyboard_devices) {
     ui::DeviceHotplugEventObserver* manager =
         ui::DeviceDataManager::GetInstance();
     manager->OnKeyboardDevicesUpdated(keyboard_devices);
   }
 
   void SetUp() override {
-    CommandLine::ForCurrentProcess()->AppendSwitch(
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
         keyboard::switches::kDisableSmartVirtualKeyboard);
     AshTestBase::SetUp();
     UpdateKeyboardDevices(std::vector<ui::KeyboardDevice>());
     UpdateTouchscreenDevices(std::vector<ui::TouchscreenDevice>());
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardControllerTest);
 };
 
@@ skipping 143 matching lines @@
   keyboards.push_back(ui::KeyboardDevice(
       2, ui::InputDeviceType::INPUT_DEVICE_EXTERNAL, "keyboard"));
   keyboards.push_back(ui::KeyboardDevice(
       3, ui::InputDeviceType::INPUT_DEVICE_EXTERNAL, "keyboard"));
   UpdateKeyboardDevices(keyboards);
   ASSERT_FALSE(keyboard::IsKeyboardEnabled());
 }
 
 }  // namespace test
 }  // namespace ash