Refactor: move flow controller from QuicConnection to QuicSession.

net/quic/reliable_quic_stream_test.cc

Index: net/quic/reliable_quic_stream_test.cc
diff --git a/net/quic/reliable_quic_stream_test.cc b/net/quic/reliable_quic_stream_test.cc
index d1ad9094e9f4bf5cc9b56f321f6c485e6f3a4c7b..4a702c90abe03a1f62026de118b0e28d544d97c3 100644
--- a/net/quic/reliable_quic_stream_test.cc
+++ b/net/quic/reliable_quic_stream_test.cc
@@ -395,7 +395,7 @@ TEST_F(ReliableQuicStreamTest, WriteOrBufferDataWithQuicAckNotifier) {
   // Set a large flow control send window so this doesn't interfere with test.
   stream_->flow_controller()->UpdateSendWindowOffset(kDataSize + 1);
   if (FLAGS_enable_quic_connection_flow_control) {
-    connection_->flow_controller()->UpdateSendWindowOffset(kDataSize + 1);
+    session_->flow_controller()->UpdateSendWindowOffset(kDataSize + 1);
   }
 
   scoped_refptr<QuicAckNotifier::DelegateInterface> proxy_delegate;
@@ -450,7 +450,7 @@ TEST_F(ReliableQuicStreamTest, WriteOrBufferDataAckNotificationBeforeFlush) {
   // Set a large flow control send window so this doesn't interfere with test.
   stream_->flow_controller()->UpdateSendWindowOffset(kDataSize + 1);
   if (FLAGS_enable_quic_connection_flow_control) {
-    connection_->flow_controller()->UpdateSendWindowOffset(kDataSize + 1);
+    session_->flow_controller()->UpdateSendWindowOffset(kDataSize + 1);
   }
 
   scoped_refptr<QuicAckNotifier::DelegateInterface> proxy_delegate;