Move the check for QUIC silent close from SendConnectionClosePacket, to

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index b6073014e8c3d2c92ff27988cbc8559200a2de4b..b3fcdf6b7c61d33c6fa859f50cad63155910aba6 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -892,7 +892,9 @@ class NET_EXPORT_PRIVATE QuicConnection
   // Contains the connection close packets if the connection has been closed.
   scoped_ptr<std::vector<QuicEncryptedPacket*>> termination_packets_;
 
-  // When true, the connection does not send a close packet on timeout.
+  // When true, the connection does not send a close packet on idle timeout due
+  // to lack of network activity.
+  // This is particularly important on mobile, where connections are short.
   bool silent_close_enabled_;
 
   FecGroupMap group_map_;