Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/websockets/WorkerThreadableWebSocketChannel.cpp

Index: Source/modules/websockets/WorkerThreadableWebSocketChannel.cpp
diff --git a/Source/modules/websockets/WorkerThreadableWebSocketChannel.cpp b/Source/modules/websockets/WorkerThreadableWebSocketChannel.cpp
index ae3f539168cecfd078b82dfad577194768c01c2a..44240b60c1439f540d735ce1f485de220be4b46d 100644
--- a/Source/modules/websockets/WorkerThreadableWebSocketChannel.cpp
+++ b/Source/modules/websockets/WorkerThreadableWebSocketChannel.cpp
@@ -381,7 +381,7 @@ WorkerThreadableWebSocketChannel::Bridge::~Bridge()
     disconnect();
 }
 
-class WorkerThreadableWebSocketChannel::WorkerGlobalScopeDidInitializeTask : public ExecutionContextTask {
+class WorkerThreadableWebSocketChannel::WorkerGlobalScopeDidInitializeTask FINAL : public ExecutionContextTask {
 public:
     static PassOwnPtr<ExecutionContextTask> create(WorkerThreadableWebSocketChannel::Peer* peer, WorkerLoaderProxy* loaderProxy, PassRefPtr<ThreadableWebSocketChannelClientWrapper> workerClientWrapper)
     {