Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/hpack/hpack_huffman_table.cc

 // 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.
 
 #include "net/spdy/hpack/hpack_huffman_table.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #include "net/spdy/hpack/hpack_input_stream.h"
 #include "net/spdy/hpack/hpack_output_stream.h"
+#include "net/spdy/platform/api/spdy_estimate_memory_usage.h"
 
 namespace net {
 
 using base::StringPiece;
 using std::string;
 
 namespace {
 
 // How many bits to index in the root decode table.
 const uint8_t kDecodeTableRootBits = 9;
@@ skipping 286 matching lines @@
       in->ConsumeBits(entry.length);
       bits = bits << entry.length;
       bits_available -= entry.length;
     }
     peeked_success = in->PeekBits(&bits_available, &bits);
   }
   NOTREACHED();
   return false;
 }
 
+size_t HpackHuffmanTable::EstimateMemoryUsage() const {
+  return SpdyEstimateMemoryUsage(decode_tables_) +
+         SpdyEstimateMemoryUsage(decode_entries_) +
+         SpdyEstimateMemoryUsage(code_by_id_) +
+         SpdyEstimateMemoryUsage(length_by_id_);
+}
+
 }  // namespace net