Remove modules/webdatabase dependency from core.

Source/modules/webdatabase/DatabaseManager.cpp

Index: Source/modules/webdatabase/DatabaseManager.cpp
diff --git a/Source/modules/webdatabase/DatabaseManager.cpp b/Source/modules/webdatabase/DatabaseManager.cpp
index 34e12367357d8e7e60a5ea37fec453d39af0dff9..41f413d1a85237f87645844d7d6f3caf4e402860 100644
--- a/Source/modules/webdatabase/DatabaseManager.cpp
+++ b/Source/modules/webdatabase/DatabaseManager.cpp
@@ -276,11 +276,9 @@ void DatabaseManager::closeDatabasesImmediately(const String& originIdentifier,
     m_server->closeDatabasesImmediately(originIdentifier, name);
 }
 
-void DatabaseManager::interruptAllDatabasesForContext(ExecutionContext* context)
+void DatabaseManager::interruptAllDatabasesForContext(DatabaseContext* databaseContext)
 {
-    RefPtr<DatabaseContext> databaseContext = existingDatabaseContextFor(context);
-    if (databaseContext)
-        m_server->interruptAllDatabasesForContext(databaseContext->backend().get());
+    m_server->interruptAllDatabasesForContext(databaseContext->backend().get());
 }
 
 void DatabaseManager::logErrorMessage(ExecutionContext* context, const String& message)