CL for testing on Win.

base/trace_event/trace_event_impl.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 "base/trace_event/trace_event_impl.h"
 
 #include <stddef.h>
 
 #include "base/format_macros.h"
 #include "base/json/string_escape.h"
@@ skipping 167 matching lines @@
   // Only reset fields that won't be initialized in Initialize(), or that may
   // hold references to other objects.
   duration_ = TimeDelta::FromInternalValue(-1);
   parameter_copy_storage_.reset();
   for (int i = 0; i < kTraceMaxNumArgs; ++i)
     convertable_values_[i].reset();
 }
 
 void TraceEvent::UpdateDuration(const TimeTicks& now,
                                 const ThreadTicks& thread_now) {
-  DCHECK_EQ(duration_.ToInternalValue(), -1);
+  if (duration_.ToInternalValue() != -1) {
+    LOG(ERROR) << "ssid duration is already set " << flags_ << " " << timestamp_ << " " << name_ << " " << (parameter_copy_storage_.get() ? *parameter_copy_storage_.get() : "no param") << " " << TraceLog::GetCategoryGroupName(category_group_enabled_);
+  }
+  CHECK_EQ(duration_.ToInternalValue(), -1);
   duration_ = now - timestamp_;
 
   // |thread_timestamp_| can be empty if the thread ticks clock wasn't
   // initialized when it was recorded.
   if (thread_timestamp_ != ThreadTicks())
     thread_duration_ = thread_now - thread_timestamp_;
 }
 
 void TraceEvent::EstimateTraceMemoryOverhead(
     TraceEventMemoryOverhead* overhead) {
@@ skipping 218 matching lines @@
         AppendValueAsJSON(arg_types_[i], arg_values_[i], &value_as_text);
 
       *out << value_as_text;
     }
     *out << "}";
   }
 }
 
 }  // namespace trace_event
 }  // namespace base