Prefix CommandLine usage with base namespace (Part 4: ash/)

ash/system/tray/system_tray_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 "ash/system/tray/system_tray.h"
 
 #include <vector>
 
 #include "ash/accessibility_delegate.h"
 #include "ash/root_window_controller.h"
@@ skipping 134 matching lines @@
 };
 
 }  // namespace
 
 class SystemTrayTest : public AshTestBase {
  public:
   SystemTrayTest() {}
   ~SystemTrayTest() override {}
 
   void SetUp() override {
-    CommandLine::ForCurrentProcess()->AppendSwitch(
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kEnableTouchFeedback);
     test::AshTestBase::SetUp();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SystemTrayTest);
 };
 
 TEST_F(SystemTrayTest, SystemTrayDefaultView) {
   SystemTray* tray = GetSystemTray();
@@ skipping 389 matching lines @@
 
   generator.set_current_location(move_point);
   generator.ReleaseTouch();
   RunAllPendingInMessageLoop();
   EXPECT_FALSE(view->active());
 }
 #endif  // OS_CHROMEOS
 
 }  // namespace test
 }  // namespace ash