Using a mock LevelDBTransaction for corruption tests.

content/browser/indexed_db/leveldb/leveldb_transaction.h

Index: content/browser/indexed_db/leveldb/leveldb_transaction.h
diff --git a/content/browser/indexed_db/leveldb/leveldb_transaction.h b/content/browser/indexed_db/leveldb/leveldb_transaction.h
index ed8b1ca24585291f44b79199b7d59e8b2e66b870..f6b5a95e1210d1a9bf612da05a60980ad2168561 100644
--- a/content/browser/indexed_db/leveldb/leveldb_transaction.h
+++ b/content/browser/indexed_db/leveldb/leveldb_transaction.h
@@ -27,18 +27,20 @@ class CONTENT_EXPORT LevelDBTransaction
 
   void Put(const base::StringPiece& key, std::string* value);
   void Remove(const base::StringPiece& key);
-  leveldb::Status Get(const base::StringPiece& key,
-                      std::string* value,
-                      bool* found);
-  leveldb::Status Commit();
+  virtual leveldb::Status Get(const base::StringPiece& key,
+                              std::string* value,
+                              bool* found);
+  virtual leveldb::Status Commit();
   void Rollback();
 
   scoped_ptr<LevelDBIterator> CreateIterator();
 
- private:
+ protected:
   virtual ~LevelDBTransaction();
   explicit LevelDBTransaction(LevelDBDatabase* db);
   friend class IndexedDBClassFactory;
+
+ private:
   friend class base::RefCounted<LevelDBTransaction>;
   FRIEND_TEST_ALL_PREFIXES(LevelDBDatabaseTest, Transaction);
   FRIEND_TEST_ALL_PREFIXES(LevelDBDatabaseTest, TransactionCommitTest);