[SPDY] Fix bug where a SPDY stream might not unstall properly in all cases

net/spdy/spdy_stream.cc

 // 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.
 
 #include "net/spdy/spdy_stream.h"
 
 #include <limits>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 669 matching lines @@
 
 bool SpdyStream::GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) {
   return session_->GetSSLCertRequestInfo(cert_request_info);
 }
 
 void SpdyStream::PossiblyResumeIfSendStalled() {
   DCHECK(!closed());
 
   if (send_stalled_by_flow_control_ && !session_->IsSendStalled() &&
       send_window_size_ > 0) {
+    net_log_.AddEvent(
+        NetLog::TYPE_SPDY_STREAM_FLOW_CONTROL_UNSTALLED,
+        NetLog::IntegerCallback("stream_id", stream_id_));
     send_stalled_by_flow_control_ = false;
     io_state_ = STATE_SEND_BODY;
     DoLoop(OK);
   }
 }
 
 bool SpdyStream::HasUrl() const {
   if (pushed_)
     return response_received();
   return request_.get() != NULL;
@@ skipping 279 matching lines @@
   UMA_HISTOGRAM_TIMES("Net.SpdyStreamDownloadTime",
       recv_last_byte_time_ - recv_first_byte_time_);
   UMA_HISTOGRAM_TIMES("Net.SpdyStreamTime",
       recv_last_byte_time_ - send_time_);
 
   UMA_HISTOGRAM_COUNTS("Net.SpdySendBytes", send_bytes_);
   UMA_HISTOGRAM_COUNTS("Net.SpdyRecvBytes", recv_bytes_);
 }
 
 }  // namespace net