Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/spdy_session.h

Index: net/spdy/spdy_session.h
diff --git a/net/spdy/spdy_session.h b/net/spdy/spdy_session.h
index fb61ec755e4f7de79b76ae226a1430ae989b6127..a78ad9210daae7813f3d3c50d80cb986ebc2b59e 100644
--- a/net/spdy/spdy_session.h
+++ b/net/spdy/spdy_session.h
@@ -191,6 +191,9 @@ class NET_EXPORT_PRIVATE SpdyStreamRequest {
   // set a delegate for the returned stream (except for test code).
   base::WeakPtr<SpdyStream> ReleaseStream();
 
+  // Returns the estimate of dynamically allocated memory in bytes.
+  size_t EstimateMemoryUsage() const;
+
  private:
   friend class SpdySession;
 
@@ -565,8 +568,10 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
   // indicate whether session is active.
   // |stats| can be assumed as being default initialized upon entry.
   // Implementation overrides fields in |stats|.
-  void DumpMemoryStats(StreamSocket::SocketMemoryStats* stats,
-                       bool* is_session_active) const;
+  // Returns the estimate of dynamically allocated memory in bytes, which
+  // includes the size attributed to the underlying socket.
+  size_t DumpMemoryStats(StreamSocket::SocketMemoryStats* stats,
+                         bool* is_session_active) const;
 
  private:
   friend class test::SpdyStreamTest;