Web SQL: Remove unnecessary abstraction.

Source/modules/webdatabase/Database.cpp

Index: Source/modules/webdatabase/Database.cpp
diff --git a/Source/modules/webdatabase/Database.cpp b/Source/modules/webdatabase/Database.cpp
index b52a25c4aca98b50da5f8057bd73cec1ce115ea0..0c7309edbd47e1489bb6ecf22688a1f0e95e8ad7 100644
--- a/Source/modules/webdatabase/Database.cpp
+++ b/Source/modules/webdatabase/Database.cpp
@@ -68,13 +68,13 @@ PassRefPtrWillBeRawPtr<Database> Database::create(ExecutionContext*, PassRefPtrW
 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()