Remove unnecesary usage of RefPtr and PassRefPtr of DatabaseContext.

Source/modules/webdatabase/Database.cpp

 /*
  * Copyright (C) 2007, 2008, 2013 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
@@ skipping 48 matching lines @@
 
 PassRefPtrWillBeRawPtr<Database> Database::create(ExecutionContext*, PassRefPtrWillBeRawPtr<DatabaseBackendBase> backend)
 {
     // FIXME: Currently, we're only simulating the backend by return the
     // frontend database as its own the backend. When we split the 2 apart,
     // this create() function should be changed to be a factory method for
     // instantiating the backend.
     return static_cast<Database*>(backend.get());
 }
 
-Database::Database(PassRefPtr<DatabaseContext> databaseContext,
+Database::Database(DatabaseContext* databaseContext,
     const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize)
-    : DatabaseBackend(databaseContext.get(), name, expectedVersion, displayName, estimatedSize)
+    : DatabaseBackend(databaseContext, name, expectedVersion, displayName, estimatedSize)
     , DatabaseBase(databaseContext->executionContext())
     , m_databaseContext(DatabaseBackend::databaseContext())
 {
     ScriptWrappable::init(this);
     m_databaseThreadSecurityOrigin = m_contextThreadSecurityOrigin->isolatedCopy();
     setFrontend(this);
 
     ASSERT(m_databaseContext->databaseThread());
 }
 
@@ skipping 161 matching lines @@
     backend()->reportStartTransactionResult(errorSite, webSqlErrorCode, sqliteErrorCode);
 }
 
 void Database::reportCommitTransactionResult(int errorSite, int webSqlErrorCode, int sqliteErrorCode)
 {
     backend()->reportCommitTransactionResult(errorSite, webSqlErrorCode, sqliteErrorCode);
 }
 
 
 } // namespace WebCore