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diff --git a/deps/v8/src/snapshot/context-deserializer.h b/deps/v8/src/snapshot/context-deserializer.h
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+++ b/deps/v8/src/snapshot/context-deserializer.h
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+// Copyright 2017 the V8 project 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 V8_SNAPSHOT_CONTEXT_DESERIALIZER_H_
+#define V8_SNAPSHOT_CONTEXT_DESERIALIZER_H_
+
+#include "src/snapshot/deserializer.h"
+#include "src/snapshot/snapshot.h"
+
+namespace v8 {
+namespace internal {
+
+class Context;
+
+// Deserializes the context-dependent object graph rooted at a given object.
+// The ContextDeserializer is not expected to deserialize any code objects.
+class V8_EXPORT_PRIVATE ContextDeserializer final : public Deserializer {
+ public:
+  static MaybeHandle<Context> DeserializeContext(
+      Isolate* isolate, const SnapshotData* data, bool can_rehash,
+      Handle<JSGlobalProxy> global_proxy,
+      v8::DeserializeEmbedderFieldsCallback embedder_fields_deserializer);
+
+ private:
+  explicit ContextDeserializer(const SnapshotData* data)
+      : Deserializer(data, false) {}
+
+  // Deserialize a single object and the objects reachable from it.
+  MaybeHandle<Object> Deserialize(
+      Isolate* isolate, Handle<JSGlobalProxy> global_proxy,
+      v8::DeserializeEmbedderFieldsCallback embedder_fields_deserializer);
+
+  void DeserializeEmbedderFields(
+      v8::DeserializeEmbedderFieldsCallback embedder_fields_deserializer);
+
+  void SetupOffHeapArrayBufferBackingStores();
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_SNAPSHOT_CONTEXT_DESERIALIZER_H_