Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/buffered_spdy_framer.cc

Index: net/spdy/buffered_spdy_framer.cc
diff --git a/net/spdy/buffered_spdy_framer.cc b/net/spdy/buffered_spdy_framer.cc
index fc583686fd94c2c19872b4ec075dd39eeec83c8f..793fdeb6f8077b7f252089da4264816ef8de14cb 100644
--- a/net/spdy/buffered_spdy_framer.cc
+++ b/net/spdy/buffered_spdy_framer.cc
@@ -9,6 +9,7 @@
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
+#include "base/trace_event/memory_usage_estimator.h"
 
 namespace net {
 
@@ -334,6 +335,12 @@ SpdyPriority BufferedSpdyFramer::GetHighestPriority() const {
   return spdy_framer_.GetHighestPriority();
 }
 
+size_t BufferedSpdyFramer::EstimateMemoryUsage() const {
+  return base::trace_event::EstimateMemoryUsage(spdy_framer_) +
+         base::trace_event::EstimateMemoryUsage(header_buffer_) +
+         base::trace_event::EstimateMemoryUsage(coalescer_);
+}
+
 void BufferedSpdyFramer::InitHeaderStreaming(SpdyStreamId stream_id) {
   header_buffer_.clear();
   header_buffer_valid_ = true;