Use mojo for Chrome Loading, Part 1

content/child/body_consumer.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_CHILD_BODY_CONSUMER_H_
+#define CONTENT_CHILD_BODY_CONSUMER_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <utility>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "content/common/url_loader.mojom.h"
+#include "mojo/message_pump/handle_watcher.h"
+#include "mojo/public/cpp/system/data_pipe.h"
+
+namespace content {
+
+class ResourceDispatcher;
+
+class BodyConsumer final : public base::RefCounted<BodyConsumer> {

[jam, 2016/05/13 00:55:06]

nit: please document this class and the methods

[yhirano, 2016/05/17 12:38:49]

Done.

+ public:
+  BodyConsumer(int request_id,
+               ResourceDispatcher* resource_dispatcher,
+               mojo::ScopedDataPipeConsumerHandle handle);
+
+  void OnComplete(mojom::URLLoaderStatusPtr status);
+  void Cancel();
+
+ private:
+  friend class base::RefCounted<BodyConsumer>;
+  ~BodyConsumer();
+
+  class ReceivedData;
+  void Reclaim(uint32_t size);
+
+  void OnReadable(MojoResult);
+  void StartWatching();
+  void NotifyCompletionIfAppropriate();
+
+  int request_id_;
+  ResourceDispatcher* resource_dispatcher_;
+  mojo::ScopedDataPipeConsumerHandle handle_;
+  mojo::common::HandleWatcher handle_watcher_;
+  mojom::URLLoaderStatusPtr completion_status_;
+
+  bool has_received_completion_ = false;
+  bool has_been_cancelled_ = false;
+  bool has_seen_end_of_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(BodyConsumer);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_BODY_CONSUMER_H_