Standardize usage of virtual/override/final in content/renderer/

content/renderer/device_sensors/device_light_event_pump_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 "device_light_event_pump.h"
 
 #include "base/message_loop/message_loop.h"
 #include "content/common/device_sensors/device_light_hardware_buffer.h"
 #include "content/public/test/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 23 matching lines @@
   bool did_change_device_light_;
   DeviceLightData data_;
 
   DISALLOW_COPY_AND_ASSIGN(MockDeviceLightListener);
 };
 
 class DeviceLightEventPumpForTesting : public DeviceLightEventPump {
  public:
   DeviceLightEventPumpForTesting()
       : DeviceLightEventPump(0) {}
-  virtual ~DeviceLightEventPumpForTesting() {}
+  ~DeviceLightEventPumpForTesting() override {}
 
   void OnDidStart(base::SharedMemoryHandle renderer_handle) {
     DeviceLightEventPump::OnDidStart(renderer_handle);
   }
-  virtual void SendStartMessage() override { }
-  virtual void SendStopMessage() override { }
-  virtual void FireEvent() override {
+  void SendStartMessage() override {}
+  void SendStopMessage() override {}
+  void FireEvent() override {
     DeviceLightEventPump::FireEvent();
     Stop();
     base::MessageLoop::current()->QuitWhenIdle();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DeviceLightEventPumpForTesting);
 };
 
 class DeviceLightEventPumpTest : public testing::Test {
@@ skipping 89 matching lines @@
       base::Bind(&DeviceLightEventPumpForTesting::FireEvent,
                  base::Unretained(light_pump())));
   base::MessageLoop::current()->Run();
 
   // No change in device light as present value is same as previous value.
   EXPECT_FALSE(listener()->did_change_device_light());
   EXPECT_EQ(last_seen_data, static_cast<double>(received_data.value));
 }
 
 }  // namespace content