Standardize usage of virtual/override/final in content/browser/

content/browser/indexed_db/indexed_db_cleanup_on_io_error_unittest.cc

Index: content/browser/indexed_db/indexed_db_cleanup_on_io_error_unittest.cc
diff --git a/content/browser/indexed_db/indexed_db_cleanup_on_io_error_unittest.cc b/content/browser/indexed_db/indexed_db_cleanup_on_io_error_unittest.cc
index 04a40c433422ac65c6a37f83ce8cce129b3a954c..27f72f2b4b5a2407210ab836997a4c66a6e959d7 100644
--- a/content/browser/indexed_db/indexed_db_cleanup_on_io_error_unittest.cc
+++ b/content/browser/indexed_db/indexed_db_cleanup_on_io_error_unittest.cc
@@ -48,10 +48,10 @@ class BustedLevelDBDatabase : public LevelDBDatabase {
       const LevelDBComparator* /*comparator*/) {
     return scoped_ptr<LevelDBDatabase>(new BustedLevelDBDatabase);
   }
-  virtual leveldb::Status Get(const base::StringPiece& key,
-                              std::string* value,
-                              bool* found,
-                              const LevelDBSnapshot* = 0) override {
+  leveldb::Status Get(const base::StringPiece& key,
+                      std::string* value,
+                      bool* found,
+                      const LevelDBSnapshot* = 0) override {
     return leveldb::Status::IOError("It's busted!");
   }
 
@@ -61,17 +61,15 @@ class BustedLevelDBDatabase : public LevelDBDatabase {
 
 class BustedLevelDBFactory : public LevelDBFactory {
  public:
-  virtual leveldb::Status OpenLevelDB(
-      const base::FilePath& file_name,
-      const LevelDBComparator* comparator,
-      scoped_ptr<LevelDBDatabase>* db,
-      bool* is_disk_full = 0) override {
+  leveldb::Status OpenLevelDB(const base::FilePath& file_name,
+                              const LevelDBComparator* comparator,
+                              scoped_ptr<LevelDBDatabase>* db,
+                              bool* is_disk_full = 0) override {
     if (open_error_.ok())
       *db = BustedLevelDBDatabase::Open(file_name, comparator);
     return open_error_;
   }
-  virtual leveldb::Status DestroyLevelDB(
-      const base::FilePath& file_name) override {
+  leveldb::Status DestroyLevelDB(const base::FilePath& file_name) override {
     return leveldb::Status::IOError("error");
   }
   void SetOpenError(const leveldb::Status& open_error) {