Standardize usage of virtual/override/final specifiers.

ash/desktop_background/wallpaper_resizer_unittest.cc

Index: ash/desktop_background/wallpaper_resizer_unittest.cc
diff --git a/ash/desktop_background/wallpaper_resizer_unittest.cc b/ash/desktop_background/wallpaper_resizer_unittest.cc
index 97bd24903ed9b1a86ec3803e92e614b42f53f579..6a06490d874c7dd12f2c069998de37b6f56a5b2f 100644
--- a/ash/desktop_background/wallpaper_resizer_unittest.cc
+++ b/ash/desktop_background/wallpaper_resizer_unittest.cc
@@ -61,7 +61,7 @@ class WallpaperResizerTest : public testing::Test,
   WallpaperResizerTest()
       : ui_thread_(content::BrowserThread::UI, &message_loop_) {
   }
-  virtual ~WallpaperResizerTest() {}
+  ~WallpaperResizerTest() override {}
 
   gfx::ImageSkia Resize(const gfx::ImageSkia& image,
                         const gfx::Size& target_size,
@@ -79,9 +79,7 @@ class WallpaperResizerTest : public testing::Test,
     message_loop_.Run();
   }
 
-  virtual void OnWallpaperResized() override {
-    message_loop_.Quit();
-  }
+  void OnWallpaperResized() override { message_loop_.Quit(); }
 
  private:
   base::MessageLoop message_loop_;