WIP POC blob transport over mojo

third_party/WebKit/Source/platform/blob/BlobBytesProvider.h

+// Copyright 2017 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 BlobBytesProvider_h
+#define BlobBytesProvider_h
+
+#include "platform/blob/BlobData.h"
+#include "public/platform/blobs.mojom-blink.h"
+
+namespace blink {
+
+class BlobBytesProvider : public storage::mojom::blink::BytesProvider {
+ public:
+  BlobBytesProvider(RefPtr<RawData> data);
+  ~BlobBytesProvider() override;
+
+  void AppendData(RefPtr<RawData> data);
+
+  // BytesProvider implementation:
+  void RequestAsStream(mojo::ScopedDataPipeProducerHandle pipe) override;
+  void RequestAsFile(uint64_t source_offset,
+                     uint64_t source_size,
+                     base::File file,
+                     uint64_t file_offset,
+                     RequestAsFileCallback callback) override;
+  String uuid;
+
+ private:
+  Vector<RefPtr<RawData>> data_;
+};
+
+}  // namespace blink
+
+#endif  // BlobBytesProvider_h