When talking >=QUIC_VERSION_22, regularly send updated bandwidth

net/quic/quic_packet_generator.h

Index: net/quic/quic_packet_generator.h
diff --git a/net/quic/quic_packet_generator.h b/net/quic/quic_packet_generator.h
index 77214df3e59a26123eed4f4d2785c80c7dd6fc96..43a46e37bea3da53073b4c2d197ff3c287c9643e 100644
--- a/net/quic/quic_packet_generator.h
+++ b/net/quic/quic_packet_generator.h
@@ -65,8 +65,7 @@ class QuicPacketGeneratorPeer;
 
 class QuicAckNotifier;
 
-class NET_EXPORT_PRIVATE QuicPacketGenerator
-    : public QuicSentPacketManager::NetworkChangeVisitor {
+class NET_EXPORT_PRIVATE QuicPacketGenerator {
  public:
   class NET_EXPORT_PRIVATE DelegateInterface {
    public:
@@ -100,9 +99,8 @@ class NET_EXPORT_PRIVATE QuicPacketGenerator
 
   virtual ~QuicPacketGenerator();
 
-  // QuicSentPacketManager::NetworkChangeVisitor methods.
-  virtual void OnCongestionWindowChange(QuicByteCount congestion_window)
-      OVERRIDE;
+  // Called by the connection in the event of the congestion window changing.
+  void OnCongestionWindowChange(QuicByteCount congestion_window);
 
   // Indicates that an ACK frame should be sent.  If |also_send_feedback| is
   // true, then it also indicates a CONGESTION_FEEDBACK frame should be sent.