Port messages sent by WebIDBCursorImpl to Mojo.

content/browser/indexed_db/cursor_impl.h

+// Copyright 2016 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 CONTENT_BROWSER_INDEXED_DB_CURSOR_IMPL_H_
+#define CONTENT_BROWSER_INDEXED_DB_CURSOR_IMPL_H_
+
+#include "base/memory/ref_counted.h"
+#include "content/common/indexed_db/indexed_db.mojom.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+namespace content {
+
+class IndexedDBCursor;
+class IndexedDBDispatcherHost;
+class IndexedDBKey;
+
+class CursorImpl : public ::indexed_db::mojom::Cursor {
+ public:
+  CursorImpl(scoped_refptr<IndexedDBCursor> cursor,
+             const url::Origin& origin,
+             scoped_refptr<IndexedDBDispatcherHost> dispatcher_host);
+  ~CursorImpl() override;
+
+  // ::indexed_db::mojom::Cursor implementation
+  void Advance(
+      uint32_t count,
+      ::indexed_db::mojom::CallbacksAssociatedPtrInfo callbacks) override;
+  void Continue(
+      const IndexedDBKey& key,
+      const IndexedDBKey& primary_key,
+      ::indexed_db::mojom::CallbacksAssociatedPtrInfo callbacks) override;
+  void Prefetch(
+      int32_t count,
+      ::indexed_db::mojom::CallbacksAssociatedPtrInfo callbacks) override;
+  void PrefetchReset(
+      int32_t used_prefetches,
+      int32_t unused_prefetches,
+      const std::vector<std::string>& unused_blob_uuids) override;
+
+ private:
+  class IDBThreadHelper;
+
+  IDBThreadHelper* helper_;
+  scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
+  const url::Origin origin_;
+  scoped_refptr<base::SingleThreadTaskRunner> idb_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(CursorImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_CURSOR_IMPL_H_