[WIP]Implement Blink side changes for navigator.language(s) support for workers.

Source/core/workers/WorkerLanguageTasks.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WorkerLanguageTasks_h
+#define WorkerLanguageTasks_h
+
+#include "core/dom/ExecutionContextTask.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/Vector.h"
+
+namespace blink {
+
+class WorkerThreadSetUserPreferredLanguagesTask : public ExecutionContextTask {
+public:
+    static PassOwnPtr<WorkerThreadSetUserPreferredLanguagesTask> create(const Vector<String>& languages);
+
+    virtual void performTask(ExecutionContext *scriptContext);
+
+private:
+    WorkerThreadSetUserPreferredLanguagesTask(const Vector<String>& languages);
+
+    Vector<String> m_languages;
+};
+
+//----
+
+class WorkerThreadAcceptLanguagesChangedTask : public ExecutionContextTask {
+public:
+    static PassOwnPtr<WorkerThreadAcceptLanguagesChangedTask> create();
+
+    virtual void performTask(ExecutionContext *scriptContext);
+
+private:
+    WorkerThreadAcceptLanguagesChangedTask();
+};
+
+} // namespace blink
+
+#endif // WorkerLanguageTasks_h