Remove bzip2 decoding support completely.

net/base/filter.h

 // Copyright (c) 2006-2008 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.
 //
 // Filter performs filtering on data streams. Sample usage:
 //
 //   IStream* pre_filter_source;
 //   ...
 //   Filter* filter = Filter::Factory(filter_type, size);
 //   int pre_filter_data_len = filter->stream_buffer_size();
@@ skipping 110 matching lines @@
     // stream.
     FILTER_DONE,
     // There is an error during filtering.
     FILTER_ERROR
   };
 
   // Specifies type of filters that can be created.
   enum FilterType {
     FILTER_TYPE_DEFLATE,
     FILTER_TYPE_GZIP,
-    FILTER_TYPE_BZIP2,
     FILTER_TYPE_GZIP_HELPING_SDCH,  // Gzip possible, but pass through allowed.
     FILTER_TYPE_SDCH,
     FILTER_TYPE_SDCH_POSSIBLE,  // Sdch possible, but pass through allowed.
     FILTER_TYPE_UNSUPPORTED,
   };
 
   virtual ~Filter();
 
   // Creates a Filter object.
   // Parameters: Filter_types specifies the type of filter created;
@@ skipping 118 matching lines @@
 
   // Context data from the owner of this filter.  Some filters need additional
   // context information (mime type, etc.) to properly function, and they access
   // this data via this reference member.
   const FilterContext& filter_context_;
 
   DISALLOW_COPY_AND_ASSIGN(Filter);
 };
 
 #endif  // NET_BASE_FILTER_H__