Clean up VMState a little bit.

src/log-utils.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 61 matching lines @@
 
   // --prof implies --log-code.
   if (FLAG_prof) FLAG_log_code = true;
 
   // --prof_lazy controls --log-code, implies --noprof_auto.
   if (FLAG_prof_lazy) {
     FLAG_log_code = false;
     FLAG_prof_auto = false;
   }
 
-  bool open_log_file = FLAG_log || FLAG_log_runtime || FLAG_log_api
-      || FLAG_log_code || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
-      || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof
-      || FLAG_log_internal_timer_events;
-
   // If we're logging anything, we need to open the log file.
-  if (open_log_file) {
+  if (Log::InitLogAtStart()) {
     if (strcmp(FLAG_logfile, "-") == 0) {
       OpenStdout();
     } else if (strcmp(FLAG_logfile, kLogToTemporaryFile) == 0) {
       OpenTemporaryFile();
     } else {
       if (strchr(FLAG_logfile, '%') != NULL ||
           !Isolate::Current()->IsDefaultIsolate()) {
         // If there's a '%' in the log file name we have to expand
         // placeholders.
         HeapStringAllocator allocator;
@@ skipping 208 matching lines @@
   ASSERT(pos_ <= Log::kMessageBufferSize);
   const int written = log_->WriteToFile(log_->message_buffer_, pos_);
   if (written != pos_) {
     log_->stop();
     log_->logger_->LogFailure();
   }
 }
 
 
 } }  // namespace v8::internal