Refactor: move flow controller from QuicConnection to QuicSession.

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 3e43e9d55b6e1576d12ff674d9ce9b4391e45d3e..50c75ea35b752591b2068a3c5622ee1bef1ba305 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -49,7 +49,6 @@ class QuicConnection;
 class QuicDecrypter;
 class QuicEncrypter;
 class QuicFecGroup;
-class QuicFlowController;
 class QuicRandom;
 
 namespace test {
@@ -217,8 +216,7 @@ class NET_EXPORT_PRIVATE QuicConnection
                  QuicConnectionHelperInterface* helper,
                  QuicPacketWriter* writer,
                  bool is_server,
-                 const QuicVersionVector& supported_versions,
-                 uint32 max_flow_control_receive_window_bytes);
+                 const QuicVersionVector& supported_versions);
   virtual ~QuicConnection();
 
   // Sets connection parameters from the supplied |config|.
@@ -267,8 +265,6 @@ class NET_EXPORT_PRIVATE QuicConnection
                           QuicStreamId last_good_stream_id,
                           const std::string& reason);
 
-  QuicFlowController* flow_controller() { return flow_controller_.get(); }
-
   // Returns statistics tracked for this connection.
   const QuicConnectionStats& GetStats();
 
@@ -460,10 +456,6 @@ class NET_EXPORT_PRIVATE QuicConnection
   bool CanWrite(TransmissionType transmission_type,
                 HasRetransmittableData retransmittable);
 
-  uint32 max_flow_control_receive_window_bytes() const {
-    return max_flow_control_receive_window_bytes_;
-  }
-
   // Stores current batch state for connection, puts the connection
   // into batch mode, and destruction restores the stored batch state.
   // While the bundler is in scope, any generated frames are bundled
@@ -760,12 +752,6 @@ class NET_EXPORT_PRIVATE QuicConnection
   // version negotiation packet.
   QuicVersionVector server_supported_versions_;
 
-  // Initial flow control receive window size for new streams.
-  uint32 max_flow_control_receive_window_bytes_;
-
-  // Used for connection level flow control.
-  scoped_ptr<QuicFlowController> flow_controller_;
-
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };