Standardize usage of virtual/override/final specifiers.

content/renderer/render_widget_unittest.cc

 // Copyright 2013 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 "content/renderer/render_widget.h"
 
 #include <vector>
 
 #include "content/common/input/synthetic_web_input_event_builders.h"
 #include "content/common/input_messages.h"
 #include "content/public/test/mock_render_thread.h"
 #include "content/test/mock_render_process.h"
 #include "ipc/ipc_test_sink.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/gfx/rect.h"
 
 namespace content {
 
 class RenderWidgetUnittest : public testing::Test {
  public:
   RenderWidgetUnittest() {}
-  virtual ~RenderWidgetUnittest() {}
+  ~RenderWidgetUnittest() override {}
 
  private:
   MockRenderProcess render_process_;
   MockRenderThread render_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetUnittest);
 };
 
 class TouchableRenderWidget : public RenderWidget {
  public:
@@ skipping 103 matching lines @@
   ASSERT_EQ(1u, widget->sink()->message_count());
   message = widget->sink()->GetMessageAt(0);
   EXPECT_EQ(InputHostMsg_HandleInputEvent_ACK::ID, message->type());
   InputHostMsg_HandleInputEvent_ACK::Read(message, &params);
   ack_state = params.a.state;
   EXPECT_EQ(INPUT_EVENT_ACK_STATE_NOT_CONSUMED, ack_state);
   widget->sink()->ClearMessages();
 }
 
 }  // namespace content