Update {virtual,override,final} for chrome/ to follow C++11 style.

chrome/browser/renderer_host/chrome_render_widget_host_view_mac_history_swiper_unit_test.mm

 // 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 "testing/gtest/include/gtest/gtest.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 
 #include "base/mac/scoped_nsobject.h"
 #import "base/mac/sdk_forward_declarations.h"
 #import "chrome/browser/renderer_host/chrome_render_widget_host_view_mac_history_swiper.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #import "third_party/ocmock/ocmock_extensions.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 
 @interface HistorySwiper (MacHistorySwiperTest)
 - (BOOL)systemSettingsAllowHistorySwiping:(NSEvent*)event;
 - (BOOL)browserCanNavigateInDirection:
         (history_swiper::NavigationDirection)forward
                                 event:(NSEvent*)event;
 - (void)removeHistoryOverlay;
 - (void)showHistoryOverlay:(history_swiper::NavigationDirection)direction;
 - (void)navigateBrowserInDirection:(history_swiper::NavigationDirection)forward;
 - (void)initiateMagicMouseHistorySwipe:(BOOL)isRightScroll
                                  event:(NSEvent*)event;
 @end
 
 class MacHistorySwiperTest : public CocoaTest {
  public:
-  virtual void SetUp() override {
+  void SetUp() override {
     CocoaTest::SetUp();
 
     [HistorySwiper resetMagicMouseState];
 
     view_ = [[NSView alloc] init];
     id mockDelegate =
         [OCMockObject mockForProtocol:@protocol(HistorySwiperDelegate)];
     [[[mockDelegate stub] andReturn:view_] viewThatWantsHistoryOverlay];
     [[[mockDelegate stub] andReturnBool:YES] shouldAllowHistorySwiping];
 
@@ skipping 37 matching lines @@
 
     historySwiper_ = [mockHistorySwiper retain];
 
     begin_count_ = 0;
     end_count_ = 0;
     navigated_right_ = false;
     navigated_left_ = false;
     magic_mouse_history_swipe_ = false;
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     [view_ release];
     [historySwiper_ release];
     CocoaTest::TearDown();
   }
 
   void startGestureInMiddle();
   void moveGestureInMiddle();
   void moveGestureAtPoint(NSPoint point);
   void momentumMoveGestureAtPoint(NSPoint point);
   void endGestureAtPoint(NSPoint point);
@@ skipping 367 matching lines @@
 
   // Large movement to the right.
   moveGestureAtPoint(makePoint(0.6, 0.51));
   endGestureAtPoint(makePoint(0.6, 0.51));
 
   EXPECT_EQ(begin_count_, 0);
   EXPECT_EQ(end_count_, 1);
   EXPECT_FALSE(navigated_right_);
   EXPECT_FALSE(navigated_left_);
 }