Emit session-level WINDOW_UPDATEs less frequently.

net/spdy/spdy_session_pool.h

Index: net/spdy/spdy_session_pool.h
diff --git a/net/spdy/spdy_session_pool.h b/net/spdy/spdy_session_pool.h
index 32b4ee33bde286a3189d1f2c70d0eade17369065..cd5a9261c6837bdbe1bb34ff9607a0eda8658447 100644
--- a/net/spdy/spdy_session_pool.h
+++ b/net/spdy/spdy_session_pool.h
@@ -56,6 +56,7 @@ class NET_EXPORT SpdySessionPool
       bool enable_compression,
       bool enable_ping_based_connection_checking,
       NextProto default_protocol,
+      size_t session_max_recv_window_size,
       size_t stream_initial_recv_window_size,
       size_t initial_max_concurrent_streams,
       size_t max_concurrent_streams_limit,
@@ -220,6 +221,7 @@ class NET_EXPORT SpdySessionPool
   bool enable_compression_;
   bool enable_ping_based_connection_checking_;
   const NextProto default_protocol_;
+  size_t session_max_recv_window_size_;
   size_t stream_initial_recv_window_size_;
   size_t initial_max_concurrent_streams_;
   size_t max_concurrent_streams_limit_;