Web SQL: Remove unnecessary abstraction.

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 50 matching lines @@
     // 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(DatabaseContext* databaseContext,
     const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize)
     : DatabaseBackend(databaseContext, name, expectedVersion, displayName, estimatedSize)
-    , DatabaseBase(databaseContext->executionContext())
     , m_databaseContext(DatabaseBackend::databaseContext())
 {
     m_databaseThreadSecurityOrigin = m_contextThreadSecurityOrigin->isolatedCopy();
     setFrontend(this);
 
     ASSERT(m_databaseContext->databaseThread());
+    ASSERT(databaseContext->isContextThread());

[haraken, 2014/09/11 09:22:59]

Not related to your CL, it's a bit confusing that m_databaseContext belongs to a
database thread but databaseContext belongs to a context thread.

[tkent, 2014/09/11 09:39:16]

You misunderstand the first ASSERT, which means m_databaseContext has a thread
object.

 }
 
 Database::~Database()
 {
 }
 
 void Database::trace(Visitor* visitor)
 {
     visitor->trace(m_databaseContext);
     DatabaseBackend::trace(visitor);
@@ skipping 154 matching lines @@
     backend()->reportStartTransactionResult(errorSite, webSqlErrorCode, sqliteErrorCode);
 }
 
 void Database::reportCommitTransactionResult(int errorSite, int webSqlErrorCode, int sqliteErrorCode)
 {
     backend()->reportCommitTransactionResult(errorSite, webSqlErrorCode, sqliteErrorCode);
 }
 
 
 } // namespace blink