Remove HpackHuffmanAggregator.

net/http/http_network_session.cc

Index: net/http/http_network_session.cc
diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index 80856419841cc3bf320648bb8b7367deb666dcb4..04eb2e5b562aa6253ac36e0417a739b7f6726643 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -28,7 +28,6 @@
 #include "net/socket/client_socket_pool_manager_impl.h"
 #include "net/socket/next_proto.h"
 #include "net/socket/ssl_client_socket.h"
-#include "net/spdy/hpack_huffman_aggregator.h"
 #include "net/spdy/spdy_session_pool.h"
 
 namespace {
@@ -191,10 +190,6 @@ HttpNetworkSession::HttpNetworkSession(const Params& params)
     }
   }
 
-  if (HpackHuffmanAggregator::UseAggregator()) {
-    huffman_aggregator_.reset(new HpackHuffmanAggregator());
-  }
-
   http_server_properties_->SetAlternateProtocolProbabilityThreshold(
       params.alternate_protocol_probability_threshold);
 }