CachedMetadata support for ServiceWorker script.

Source/core/workers/WorkerScriptCachedMetadataHandler.h

Index: Source/core/workers/WorkerScriptCachedMetadataHandler.h
diff --git a/Source/core/workers/WorkerScriptCachedMetadataHandler.h b/Source/core/workers/WorkerScriptCachedMetadataHandler.h
new file mode 100644
index 0000000000000000000000000000000000000000..22f75b89ab315615755e735dfc0af654ed2bf022
--- /dev/null
+++ b/Source/core/workers/WorkerScriptCachedMetadataHandler.h
@@ -0,0 +1,34 @@
+// Copyright 2015 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 WorkerScriptCachedMetadataHandler_h
+#define WorkerScriptCachedMetadataHandler_h
+
+#include "core/fetch/CachedMetadataHandler.h"
+#include "platform/weborigin/KURL.h"
+#include "wtf/Vector.h"
+
+namespace blink {
+
+class WorkerGlobalScope;
+class CachedMetadata;
+
+class WorkerScriptCachedMetadataHandler : public CachedMetadataHandler {
+public:
+    WorkerScriptCachedMetadataHandler(WorkerGlobalScope*, const KURL& /* scriptURL */, const Vector<char>* /* metaData */);
+    ~WorkerScriptCachedMetadataHandler() override;
+    void setCachedMetadata(unsigned /* dataTypeID */, const char*, size_t, CacheType) override;
+    void clearCachedMetadata(CacheType) override;
+    CachedMetadata* cachedMetadata(unsigned /* dataTypeID */) const override;
+    String encoding() const override;
+
+private:
+    WorkerGlobalScope* m_workerGlobalScope;
+    KURL m_scriptURL;
+    RefPtr<CachedMetadata> m_cachedMetadata;
+};
+
+} // namespace blink
+
+#endif // WorkerScriptCachedMetadataHandler_h