Standardize usage of virtual/override/final in cc/

cc/test/fake_tile_manager.h

Index: cc/test/fake_tile_manager.h
diff --git a/cc/test/fake_tile_manager.h b/cc/test/fake_tile_manager.h
index ee6ccf36334479c39a76628ecf24a5c2459b6b97..84f794e096c7b65ac2e1db4ddbe0f3ad67c5d88b 100644
--- a/cc/test/fake_tile_manager.h
+++ b/cc/test/fake_tile_manager.h
@@ -16,13 +16,13 @@ class FakeTileManager : public TileManager {
  public:
   explicit FakeTileManager(TileManagerClient* client);
   FakeTileManager(TileManagerClient* client, ResourcePool* resource_pool);
-  virtual ~FakeTileManager();
+  ~FakeTileManager() override;
 
   bool HasBeenAssignedMemory(Tile* tile);
   void AssignMemoryToTiles(
       const GlobalStateThatImpactsTilePriority& state);
 
-  virtual void Release(Tile* tile) override;
+  void Release(Tile* tile) override;
 
   std::vector<Tile*> tiles_for_raster;
 };