Update {virtual,override,final} to follow C++11 style in ui.

ui/display/chromeos/update_display_configuration_task_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 "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/display/chromeos/test/action_logger_util.h"
 #include "ui/display/chromeos/test/test_display_snapshot.h"
@@ skipping 29 matching lines @@
   }
 
   DisplayConfigurator::StateController* GetStateController() const override {
     return nullptr;
   }
 
   MultipleDisplayState GetDisplayState() const override {
     return display_state_;
   }
 
-  virtual chromeos::DisplayPowerState GetPowerState() const override {
+  chromeos::DisplayPowerState GetPowerState() const override {
     return power_state_;
   }
 
-  virtual std::vector<DisplayConfigurator::DisplayState> ParseDisplays(
+  std::vector<DisplayConfigurator::DisplayState> ParseDisplays(
       const std::vector<DisplaySnapshot*>& displays) const override {
     std::vector<DisplayConfigurator::DisplayState> parsed_displays;
     for (DisplaySnapshot* display : displays) {
       DisplayConfigurator::DisplayState state;
       state.display = display;
       state.selected_mode = display->native_mode();
       if (should_mirror_)
         state.mirror_mode = FindMirrorMode(displays);
 
       parsed_displays.push_back(state);
     }
 
     return parsed_displays;
   }
 
-  virtual bool GetDisplayLayout(
+  bool GetDisplayLayout(
       const std::vector<DisplayConfigurator::DisplayState>& displays,
       MultipleDisplayState new_display_state,
       chromeos::DisplayPowerState new_power_state,
       std::vector<DisplayConfigureRequest>* requests,
       gfx::Size* framebuffer_size) const override {
     gfx::Point origin;
     for (const DisplayConfigurator::DisplayState& state : displays) {
       const DisplayMode* mode = state.selected_mode;
       if (new_display_state == MULTIPLE_DISPLAY_STATE_DUAL_MIRROR)
         mode = state.mirror_mode;
@@ skipping 296 matching lines @@
   EXPECT_EQ(
       JoinActions(kGrab, GetFramebufferAction(small_mode_.size(), &displays_[0],
                                               nullptr).c_str(),
                   GetCrtcAction(displays_[0], nullptr, gfx::Point()).c_str(),
                   kUngrab, NULL),
       log_.GetActionsAndClear());
 }
 
 }  // namespace test
 }  // namespace ui