Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/hpack/hpack_static_table.cc

Index: net/spdy/hpack/hpack_static_table.cc
diff --git a/net/spdy/hpack/hpack_static_table.cc b/net/spdy/hpack/hpack_static_table.cc
index 5588ebe183800bbcda42786ea20be6bd9ca1552c..2e572cfa29caf78bb9f93a3d5c0a04b6e11283ba 100644
--- a/net/spdy/hpack/hpack_static_table.cc
+++ b/net/spdy/hpack/hpack_static_table.cc
@@ -5,6 +5,7 @@
 #include "net/spdy/hpack/hpack_static_table.h"
 
 #include "base/logging.h"
+#include "base/trace_event/memory_usage_estimator.h"
 #include "net/spdy/hpack/hpack_constants.h"
 #include "net/spdy/hpack/hpack_entry.h"
 
@@ -39,4 +40,10 @@ bool HpackStaticTable::IsInitialized() const {
   return !static_entries_.empty();
 }
 
+size_t HpackStaticTable::EstimateMemoryUsage() const {
+  return base::trace_event::EstimateMemoryUsage(static_entries_) +
+         base::trace_event::EstimateMemoryUsage(static_index_) +
+         base::trace_event::EstimateMemoryUsage(static_name_index_);
+}
+
 }  // namespace net