Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/hpack/hpack_header_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_header_table.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
+#include "base/trace_event/memory_usage_estimator.h"
 #include "net/spdy/hpack/hpack_constants.h"
 #include "net/spdy/hpack/hpack_static_table.h"
 #include "net/spdy/spdy_flags.h"
 
 namespace net {
 
 using base::StringPiece;
 
 size_t HpackHeaderTable::EntryHasher::operator()(
     const HpackEntry* entry) const {
@@ skipping 247 matching lines @@
   DVLOG(2) << "Full Dynamic Index:";
   for (auto* entry : dynamic_index_) {
     DVLOG(2) << "  " << entry->GetDebugString();
   }
   DVLOG(2) << "Full Dynamic Name Index:";
   for (const auto it : dynamic_name_index_) {
     DVLOG(2) << "  " << it.first << ": " << it.second->GetDebugString();
   }
 }
 
+size_t HpackHeaderTable::EstimateMemoryUsage() const {
+  return base::trace_event::EstimateMemoryUsage(dynamic_entries_) +
+         base::trace_event::EstimateMemoryUsage(dynamic_index_) +
+         base::trace_event::EstimateMemoryUsage(dynamic_name_index_);
+}
+
 }  // namespace net