Move receive_window_ from BbrTcpSender and TcpCubicSender to

net/quic/test_tools/quic_config_peer.cc

Index: net/quic/test_tools/quic_config_peer.cc
diff --git a/net/quic/test_tools/quic_config_peer.cc b/net/quic/test_tools/quic_config_peer.cc
index 6aa2499cddf04f051dc64189b8e86ee7604ba46a..7c84001512af63088c0610ca9c8bbeaf2865ad73 100644
--- a/net/quic/test_tools/quic_config_peer.cc
+++ b/net/quic/test_tools/quic_config_peer.cc
@@ -16,6 +16,13 @@ void QuicConfigPeer::SetReceivedInitialWindow(QuicConfig* config,
 }
 
 // static
+void QuicConfigPeer::SetReceivedSocketReceiveBuffer(
+    QuicConfig* config,
+    uint32 receive_buffer_bytes) {
+  config->socket_receive_buffer_.SetReceivedValue(receive_buffer_bytes);
+}
+
+// static
 void QuicConfigPeer::SetReceivedInitialFlowControlWindow(QuicConfig* config,
                                                          uint32 window_bytes) {
   config->initial_flow_control_window_bytes_.SetReceivedValue(window_bytes);