Make WebURLLoader capable of retaining received buffers.

content/public/child/fixed_received_data.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 CONTENT_PUBLIC_CHILD_FIXED_RECEIVED_DATA_H_
+#define CONTENT_PUBLIC_CHILD_FIXED_RECEIVED_DATA_H_
+
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "content/common/content_export.h"
+#include "content/public/child/request_peer.h"
+
+namespace content {
+
+class CONTENT_EXPORT FixedReceivedData final
+    : public RequestPeer::ReceivedData {
+ public:
+  FixedReceivedData(const char* data, size_t length, int encoded_length);
+  explicit FixedReceivedData(scoped_ptr<ReceivedData> data);
+  FixedReceivedData(const std::vector<char>& data, int encoded_length);
+  ~FixedReceivedData() override;
+
+  const char* payload() const override;
+  int length() const override;
+  int encoded_length() const override;
+
+ private:
+  std::vector<char> data_;
+  int encoded_length_;
+
+  DISALLOW_COPY_AND_ASSIGN(FixedReceivedData);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_CHILD_FIXED_RECEIVED_DATA_H_