Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/buffered_spdy_framer.h

Index: net/spdy/buffered_spdy_framer.h
diff --git a/net/spdy/buffered_spdy_framer.h b/net/spdy/buffered_spdy_framer.h
index 4352e7fd3ca7e1aab7aae8505d814d9f9fdcd8a4..156002527b8ed2fce9d832c509e2245d575fb01c 100644
--- a/net/spdy/buffered_spdy_framer.h
+++ b/net/spdy/buffered_spdy_framer.h
@@ -235,6 +235,9 @@ class NET_EXPORT_PRIVATE BufferedSpdyFramer
 
   int frames_received() const { return frames_received_; }
 
+  // Returns the estimate of dynamically allocated memory in bytes.
+  size_t EstimateMemoryUsage() const;
+
  private:
   void InitHeaderStreaming(SpdyStreamId stream_id);