Use HTTP status return code to make SDCH handling more robust...

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 54 matching lines @@
   // Is data supplied from cache, or fresh across the net?
   virtual bool IsCachedContent() const = 0;
 
   // Was this data flagged as a response to a request with an SDCH dictionary?
   virtual bool IsSdchResponse() const = 0;
 
   // How many bytes were read from the net or cache so far (and potentially
   // pushed into a filter for processing)?
   virtual int64 GetByteReadCount() const = 0;
 
+  // What response code was received with the associated network transaction?
+  // For example: 200 is ok.   4xx are error codes. etc.
+  virtual int GetResponseCode() const = 0;
+
   // What is the desirable input buffer size for these filters?
   // This value is currently supplied by the context, and is constant for all
   // filters, even when they are part of a chain of filters. (i.e., we currently
   // don't change the input buffer sizes for a linked chain of filters, and the
   // buffer size for input to all filters in a chain is this one constant).
   virtual int GetInputStreamBufferSize() const = 0;
 };
 
 //------------------------------------------------------------------------------
 class Filter {
@@ skipping 149 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__