Update from https://crrev.com/304715

net/filter/sdch_filter.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.
 
 // SdchFilter applies open_vcdiff content decoding to a datastream.
 // This decoding uses a pre-cached dictionary of text fragments to decode
 // (expand) the stream back to its original contents.
 //
 // This SdchFilter internally uses open_vcdiff/vcdec library to do decoding.
 //
@@ skipping 36 matching lines @@
   enum DecodingStatus {
     DECODING_UNINITIALIZED,
     WAITING_FOR_DICTIONARY_SELECTION,
     DECODING_IN_PROGRESS,
     DECODING_ERROR,
     META_REFRESH_RECOVERY,  // Decoding error being handled by a meta-refresh.
     PASS_THROUGH,  // Non-sdch content being passed without alteration.
   };
 
   // Only to be instantiated by Filter::Factory.
-  explicit SdchFilter(const FilterContext& filter_context);
+  SdchFilter(FilterType type, const FilterContext& filter_context);
   friend class Filter;
 
   // Identify the suggested dictionary, and initialize underlying decompressor.
   Filter::FilterStatus InitializeDictionary();
 
   // Move data that was internally buffered (after decompression) to the
   // specified dest_buffer.
   int OutputBufferExcess(char* const dest_buffer, size_t available_space);
 
   // Add SDCH Problem to net-log and record histogram.
@@ skipping 60 matching lines @@
   // To facilitate error recovery, allow filter to know if content is text/html
   // by checking within this mime type (we may do a meta-refresh via html).
   std::string mime_type_;
 
   DISALLOW_COPY_AND_ASSIGN(SdchFilter);
 };
 
 }  // namespace net
 
 #endif  // NET_FILTER_SDCH_FILTER_H_