Introduce WebSocketDeflatePredictor.

net/websockets/websocket_deflate_predictor_impl.h

+// Copyright 2013 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 NET_WEBSOCKETS_WEBSOCKET_DEFLATE_PREDICTOR_IMPL_H_
+#define NET_WEBSOCKETS_WEBSOCKET_DEFLATE_PREDICTOR_IMPL_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
+#include "net/base/net_export.h"
+#include "net/websockets/websocket_deflate_predictor.h"
+
+namespace net {
+
+struct WebSocketFrame;
+
+// WebSocketDeflatePredictor is an interface class used for judging whether
+// a WebSocketDeflateStream should compress a message or not.

[Adam Rice, 2013/10/25 13:05:25]

This comment is wrong.

[yhirano, 2013/10/28 01:42:46]

Thanks, done.

+class NET_EXPORT_PRIVATE WebSocketDeflatePredictorImpl
+    : public WebSocketDeflatePredictor {
+ public:
+  virtual ~WebSocketDeflatePredictorImpl() {}
+
+  virtual Result Predict(const ScopedVector<WebSocketFrame>& frames,
+                         size_t frame_index) OVERRIDE;
+  virtual void RecordProcessedDataFrame(const WebSocketFrame* frame) OVERRIDE;
+  virtual void RecordSentDataFrame(const WebSocketFrame* frame) OVERRIDE;
+};
+
+}  // namespace net
+
+#endif  // NET_WEBSOCKETS_WEBSOCKET_DEFLATE_PREDICTOR_IMPL_H_