Expose Durable Storage API to script

Source/modules/quota/DurableStorageController.h

Index: Source/modules/quota/DurableStorageController.h
diff --git a/Source/modules/quota/DurableStorageController.h b/Source/modules/quota/DurableStorageController.h
new file mode 100644
index 0000000000000000000000000000000000000000..f391e6164e50a402b64ee40efb336a8fc2a379ae
--- /dev/null
+++ b/Source/modules/quota/DurableStorageController.h
@@ -0,0 +1,44 @@
+// 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 DurableStorageController_h
+#define DurableStorageController_h
+
+#include "core/frame/LocalFrameLifecycleObserver.h"
+#include "modules/ModulesExport.h"
+#include "platform/Supplementable.h"
+
+namespace blink {
+
+class WebDurableStorageDispatcher;
+
+class MODULES_EXPORT DurableStorageController final
+    : public NoBaseWillBeGarbageCollectedFinalized<DurableStorageController>
+    , public WillBeHeapSupplement<LocalFrame>
+    , public LocalFrameLifecycleObserver {
+    WTF_MAKE_NONCOPYABLE(DurableStorageController);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DurableStorageController);
+public:
+    virtual ~DurableStorageController();
+
+    static void provideTo(LocalFrame&, WebDurableStorageDispatcher*);
+    static DurableStorageController* from(LocalFrame&);
+    static const char* supplementName();
+
+    WebDurableStorageDispatcher* client() const;
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    DurableStorageController(LocalFrame&, WebDurableStorageDispatcher*);
+
+    // Inherited from LocalFrameLifecycleObserver.
+    virtual void willDetachFrameHost() override;
+
+    WebDurableStorageDispatcher* m_client;
+};
+
+} // namespace blink
+
+#endif // DurableStorageController_h