Landing Recent QUIC changes until Mon Apr 17 2017

net/quic/core/quic_flow_controller.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_CORE_QUIC_FLOW_CONTROLLER_H_
 #define NET_QUIC_CORE_QUIC_FLOW_CONTROLLER_H_
 
 #include "base/macros.h"
 #include "net/quic/core/quic_packets.h"
 #include "net/quic/platform/api/quic_export.h"
@@ skipping 44 matching lines @@
   // in the case where |new_offset| is <= highest_received_byte_offset_.
   bool UpdateHighestReceivedOffset(QuicStreamOffset new_offset);
 
   // Called when bytes received from the peer are consumed locally. This may
   // trigger the sending of a WINDOW_UPDATE frame using |connection|.
   void AddBytesConsumed(QuicByteCount bytes_consumed);
 
   // Called when bytes are sent to the peer.
   void AddBytesSent(QuicByteCount bytes_sent);
 
-  // Set a new send window offset.
-  // Returns true if this increases send_window_offset_ and is now blocked.
+  // Increases |send_window_offset_| if |new_send_window_offset| is
+  // greater than the current value.  Returns true if this increase
+  // also causes us to change from a blocked state to unblocked.  In
+  // all other cases, returns false.
   bool UpdateSendWindowOffset(QuicStreamOffset new_send_window_offset);
 
   // QuicFlowControllerInterface.
   void EnsureWindowAtLeast(QuicByteCount window_size) override;
 
   // Returns the current available send window.
   QuicByteCount SendWindowSize() const;
 
   // Send a BLOCKED frame if appropriate.
   void MaybeSendBlocked();
@@ skipping 113 matching lines @@
   // Keep time of the last time a window update was sent.  We use this
   // as part of the receive window auto tuning.
   QuicTime prev_window_update_time_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicFlowController);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_QUIC_FLOW_CONTROLLER_H_