Web SQL: Remove unnecessary abstraction.

Source/modules/webdatabase/Database.h

Index: Source/modules/webdatabase/Database.h
diff --git a/Source/modules/webdatabase/Database.h b/Source/modules/webdatabase/Database.h
index d7c6853e7e24e12e19c4e7a39c3c45305a5b205d..0df0f642919e312cf6f367f643e97556e7224066 100644
--- a/Source/modules/webdatabase/Database.h
+++ b/Source/modules/webdatabase/Database.h
@@ -31,7 +31,6 @@
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "modules/webdatabase/DatabaseBackend.h"
-#include "modules/webdatabase/DatabaseBase.h"
 #include "modules/webdatabase/DatabaseBasicTypes.h"
 #include "modules/webdatabase/DatabaseError.h"
 #include "wtf/text/WTFString.h"
@@ -48,7 +47,7 @@ class SQLTransactionCallback;
 class SQLTransactionErrorCallback;
 class VoidCallback;
 
-class Database FINAL : public DatabaseBackend, public DatabaseBase, public ScriptWrappable {
+class Database FINAL : public DatabaseBackend, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~Database();