QUIC flow control now based on highest received byte offset rather than

net/quic/reliable_quic_stream.h

Index: net/quic/reliable_quic_stream.h
diff --git a/net/quic/reliable_quic_stream.h b/net/quic/reliable_quic_stream.h
index 7016d81960fa31a9e6178a3762c94b097072fd47..68ff6ddaeba171cd38778adbce67d5352b40d1f9 100644
--- a/net/quic/reliable_quic_stream.h
+++ b/net/quic/reliable_quic_stream.h
@@ -98,11 +98,9 @@ class NET_EXPORT_PRIVATE ReliableQuicStream {
 
   QuicFlowController* flow_controller() { return &flow_controller_; }
 
-  // Called by the stream sequencer as bytes are added to the buffer.
-  void AddBytesBuffered(uint64 bytes);
-  // Called by the stream sequencer as bytes are removed from the buffer.
-  void RemoveBytesBuffered(uint64 bytes);
-  // Called when bytes are sent to the peer.
+  // Called when we see a frame which could increase the highest offset.
+  void MaybeIncreaseHighestReceivedOffset(uint64 new_offset);
+  // Called when bytese are sent to the peer.
   void AddBytesSent(uint64 bytes);
   // Called by the stream sequencer as bytes are consumed from the buffer.
   // If our receive window has dropped below the threshold, then send a
@@ -168,12 +166,6 @@ class NET_EXPORT_PRIVATE ReliableQuicStream {
     scoped_refptr<ProxyAckNotifierDelegate> delegate;
   };
 
-  // Calculates and returns available flow control send window.
-  uint64 SendWindowSize() const;
-
-  // Calculates and returns total number of bytes this stream has received.
-  uint64 TotalReceivedBytes() const;
-
   // Calls MaybeSendBlocked on our flow controller, and connection level flow
   // controller. If we are flow control blocked, marks this stream as write
   // blocked.