Implement WebDataConsumerHandle.

content/child/web_data_consumer_handle_impl.h

+// Copyright 2014 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_WEB_DATA_CONSUMER_HANDLE_IMPL_H_
+#define CONTENT_CHILD_WEB_DATA_CONSUMER_HANDLE_IMPL_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "mojo/common/handle_watcher.h"
+#include "mojo/public/cpp/system/data_pipe.h"
+#include "third_party/WebKit/public/platform/WebDataConsumerHandle.h"
+
+namespace content {
+
+class WebDataConsumerHandleImpl final : public blink::WebDataConsumerHandle {
+  typedef mojo::ScopedDataPipeConsumerHandle Handle;
+ public:
+  explicit WebDataConsumerHandleImpl(Handle handle);
+  virtual ~WebDataConsumerHandleImpl();
+
+  virtual Result read(void* data, size_t size, Flags flags,
+                      size_t* readSize) override;

[tyoshino (SeeGerritForStatus), 2014/10/23 07:22:43]

I remember I was asked not to specify override to implementation of Blink public
API. Does it apply to this file?

[yhirano, 2014/10/23 08:35:39]

Maybe. Should I make WebDataConsumerHandle's methods non-pure as well?

[tyoshino (SeeGerritForStatus), 2014/10/23 09:38:50]

Yeah. Please.

+  virtual Result beginRead(const void** buffer, Flags flags,
+                           size_t* available) override;
+  virtual Result endRead(size_t readSize) override;
+  virtual void registerClient(Client* client);
+  virtual void unregisterClient();
+
+ private:
+  Result HandleReadResult(MojoResult);
+  void OnHandleGotReadable(MojoResult);
+
+  Handle handle_;
+  Client* client_;
+  mojo::common::HandleWatcher handle_watcher_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_WEB_DATA_CONSUMER_HANDLE_IMPL_H_