Remove unnecesary usage of RefPtr and PassRefPtr of DatabaseContext.

Source/modules/webdatabase/DatabaseServer.cpp

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 32 matching lines @@
 void DatabaseServer::closeDatabasesImmediately(const String& originIdentifier, const String& name)
 {
     DatabaseTracker::tracker().closeDatabasesImmediately(originIdentifier, name);
 }
 
 void DatabaseServer::interruptAllDatabasesForContext(const DatabaseContext* context)
 {
     DatabaseTracker::tracker().interruptAllDatabasesForContext(context);
 }
 
-PassRefPtrWillBeRawPtr<DatabaseBackendBase> DatabaseServer::openDatabase(RefPtr<DatabaseContext>& backendContext,
+PassRefPtrWillBeRawPtr<DatabaseBackendBase> DatabaseServer::openDatabase(DatabaseContext* backendContext,
     DatabaseType type, const String& name, const String& expectedVersion, const String& displayName,
     unsigned long estimatedSize, bool setVersionInNewDatabase, DatabaseError &error, String& errorMessage)
 {
     RefPtrWillBeRawPtr<DatabaseBackendBase> database = nullptr;
-    if (DatabaseTracker::tracker().canEstablishDatabase(backendContext.get(), name, displayName, estimatedSize, error))
+    if (DatabaseTracker::tracker().canEstablishDatabase(backendContext, name, displayName, estimatedSize, error))
         database = createDatabase(backendContext, type, name, expectedVersion, displayName, estimatedSize, setVersionInNewDatabase, error, errorMessage);
     return database.release();
 }
 
-PassRefPtrWillBeRawPtr<DatabaseBackendBase> DatabaseServer::createDatabase(RefPtr<DatabaseContext>& backendContext,
+PassRefPtrWillBeRawPtr<DatabaseBackendBase> DatabaseServer::createDatabase(DatabaseContext* backendContext,
     DatabaseType type, const String& name, const String& expectedVersion, const String& displayName,
     unsigned long estimatedSize, bool setVersionInNewDatabase, DatabaseError& error, String& errorMessage)
 {
     RefPtrWillBeRawPtr<DatabaseBackendBase> database = nullptr;
     switch (type) {
     case DatabaseType::Async:
         database = adoptRefWillBeNoop(new Database(backendContext, name, expectedVersion, displayName, estimatedSize));
         break;
     case DatabaseType::Sync:
         database = adoptRefWillBeNoop(new DatabaseSync(backendContext, name, expectedVersion, displayName, estimatedSize));
     }
 
     if (!database->openAndVerifyVersion(setVersionInNewDatabase, error, errorMessage))
         return nullptr;
     return database.release();
 }
 
 } // namespace WebCore