[NOT FOR REVIEW] Instrument net/ with trace events.

net/spdy/spdy_session.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_session.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 32 matching lines @@
 #include "net/spdy/spdy_buffer_producer.h"
 #include "net/spdy/spdy_frame_builder.h"
 #include "net/spdy/spdy_http_utils.h"
 #include "net/spdy/spdy_protocol.h"
 #include "net/spdy/spdy_session_pool.h"
 #include "net/spdy/spdy_stream.h"
 #include "net/ssl/channel_id_service.h"
 #include "net/ssl/ssl_cipher_suite_names.h"
 #include "net/ssl/ssl_connection_status_flags.h"
 
+#include "base/trace_event/trace_event.h"
+
 namespace net {
 
 namespace {
 
 const int kReadBufferSize = 8 * 1024;
 const int kDefaultConnectionAtRiskOfLossSeconds = 10;
 const int kHungIntervalSeconds = 10;
 
 // Minimum seconds that unclaimed pushed streams will be kept in memory.
 const int kMinPushedStreamLifetimeSeconds = 300;
@@ skipping 1322 matching lines @@
 
   DCHECK(buffered_spdy_framer_.get());
   scoped_ptr<SpdyFrame> rst_frame(
       buffered_spdy_framer_->CreateRstStream(stream_id, status));
 
   EnqueueSessionWrite(priority, RST_STREAM, std::move(rst_frame));
   RecordProtocolErrorHistogram(MapRstStreamStatusToProtocolError(status));
 }
 
 void SpdySession::PumpReadLoop(ReadState expected_read_state, int result) {
+  TRACE_EVENT0("net", "net::SpdySession::PumpReadLoop");
   // TODO(bnc): Remove ScopedTracker below once crbug.com/462774 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION("462774 SpdySession::PumpReadLoop"));
 
   CHECK(!in_io_loop_);
   if (availability_state_ == STATE_DRAINING) {
     return;
   }
   ignore_result(DoReadLoop(expected_read_state, result));
 }
@@ skipping 1885 matching lines @@
     if (!queue->empty()) {
       SpdyStreamId stream_id = queue->front();
       queue->pop_front();
       return stream_id;
     }
   }
   return 0;
 }
 
 }  // namespace net