fix assertion in Logger::CurrentTimeEvent with --prof

src/log.cc

 // Copyright 2011 the V8 project 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 "src/log.h"
 
 #include <cstdarg>
 #include <sstream>
 
 #include "src/v8.h"
@@ skipping 886 matching lines @@
   if (!log_->IsEnabled() || !FLAG_log_internal_timer_events) return;
   Log::MessageBuilder msg(log_);
   int since_epoch = static_cast<int>(timer_.Elapsed().InMicroseconds());
   msg.Append("code-deopt,%ld,%d", since_epoch, code->CodeSize());
   msg.WriteToLogFile();
 }
 
 
 void Logger::CurrentTimeEvent() {
   if (!log_->IsEnabled()) return;
-  DCHECK(FLAG_log_internal_timer_events);
+  DCHECK(FLAG_log_timer_events || FLAG_prof_cpp);
   Log::MessageBuilder msg(log_);
   int since_epoch = static_cast<int>(timer_.Elapsed().InMicroseconds());
   msg.Append("current-time,%ld", since_epoch);
   msg.WriteToLogFile();
 }
 
 
 void Logger::TimerEvent(Logger::StartEnd se, const char* name) {
   if (!log_->IsEnabled()) return;
   DCHECK(FLAG_log_internal_timer_events);
@@ skipping 997 matching lines @@
   if (jit_logger_) {
     removeCodeEventListener(jit_logger_);
     delete jit_logger_;
     jit_logger_ = NULL;
   }
 
   return log_->Close();
 }
 
 } }  // namespace v8::internal