Wholesale move sky/engine/tonic to tonic

tonic/dart_snapshot_loader.h

+// 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 SKY_ENGINE_TONIC_DART_SNAPSHOT_LOADER_H_
+#define SKY_ENGINE_TONIC_DART_SNAPSHOT_LOADER_H_
+
+#include <vector>
+
+#include "base/callback_forward.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "dart/runtime/include/dart_api.h"
+#include "mojo/common/data_pipe_drainer.h"
+
+namespace blink {
+class DartState;
+
+class DartSnapshotLoader : public mojo::common::DataPipeDrainer::Client {
+ public:
+  explicit DartSnapshotLoader(DartState* dart_state);
+  ~DartSnapshotLoader();
+
+  void LoadSnapshot(mojo::ScopedDataPipeConsumerHandle pipe,
+                    const base::Closure& callback);
+
+ private:
+  // mojo::common::DataPipeDrainer::Client
+  void OnDataAvailable(const void* data, size_t num_bytes) override;
+  void OnDataComplete() override;
+
+  base::WeakPtr<DartState> dart_state_;
+  std::unique_ptr<mojo::common::DataPipeDrainer> drainer_;
+  // TODO(abarth): Should we be using SharedBuffer to buffer the data?
+  std::vector<uint8_t> buffer_;
+  base::Closure callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(DartSnapshotLoader);
+};
+
+}  // namespace blink
+
+#endif  // SKY_ENGINE_TONIC_DART_SNAPSHOT_LOADER_H_