Introduce WebSocketDeflatePredictor.

net/websockets/websocket_deflate_predictor_impl.cc

+// 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.
+
+#include "net/websockets/websocket_deflate_predictor_impl.h"
+
+namespace net {
+
+typedef WebSocketDeflatePredictor::Result Result;
+
+Result WebSocketDeflatePredictorImpl::Predict(
+    const ScopedVector<WebSocketFrame>& frames,
+    size_t frame_index) {
+  return DEFLATE;
+}
+
+void WebSocketDeflatePredictorImpl::RecordInputDataFrame(
+    const WebSocketFrame* frame) {}
+
+void WebSocketDeflatePredictorImpl::RecordWrittenDataFrame(
+    const WebSocketFrame* frame) {}
+
+}  // namespace net