Don't set QUIC's write alarm if we are connection flow control blocked.

net/quic/quic_session.h

 // Copyright (c) 2012 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.
 //
 // A QuicSession, which demuxes a single connection to individual streams.
 
 #ifndef NET_QUIC_QUIC_SESSION_H_
 #define NET_QUIC_QUIC_SESSION_H_
 
 #include <vector>
@@ skipping 55 matching lines @@
   virtual void OnGoAway(const QuicGoAwayFrame& frame) OVERRIDE;
   virtual void OnWindowUpdateFrames(
       const std::vector<QuicWindowUpdateFrame>& frames) OVERRIDE;
   virtual void OnBlockedFrames(
       const std::vector<QuicBlockedFrame>& frames) OVERRIDE;
   virtual void OnConnectionClosed(QuicErrorCode error, bool from_peer) OVERRIDE;
   virtual void OnWriteBlocked() OVERRIDE {}
   virtual void OnSuccessfulVersionNegotiation(
       const QuicVersion& version) OVERRIDE;
   virtual void OnCanWrite() OVERRIDE;
-  virtual bool HasPendingWrites() const OVERRIDE;
+  virtual bool WillingAndAbleToWrite() const OVERRIDE;
   virtual bool HasPendingHandshake() const OVERRIDE;
   virtual bool HasOpenDataStreams() const OVERRIDE;
 
   // Called by the headers stream when headers have been received for a stream.
   virtual void OnStreamHeaders(QuicStreamId stream_id,
                                base::StringPiece headers_data);
   // Called by the headers stream when headers with a priority have been
   // received for this stream.  This method will only be called for server
   // streams.
   virtual void OnStreamHeadersPriority(QuicStreamId stream_id,
@@ skipping 221 matching lines @@
 
   // Initial flow control receive window size for new streams.
   uint32 max_flow_control_receive_window_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSession);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SESSION_H_