Kill some unused code.

src/log.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 352 matching lines @@
   for (int i = 0; i < NUMBER_OF_LOG_EVENTS; ++i) {
     msg.Append("alias,%s,%s\n",
                kCompressedLogEventsNames[i], kLongLogEventsNames[i]);
   }
   msg.WriteToLogFile();
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 
-void Logger::Preamble(const char* content) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
-  if (!Log::IsEnabled() || !FLAG_log_code) return;
-  LogMessageBuilder msg;
-  msg.WriteCStringToLogFile(content);
-#endif
-}
-
-
 void Logger::StringEvent(const char* name, const char* value) {
 #ifdef ENABLE_LOGGING_AND_PROFILING
   if (FLAG_log) UncheckedStringEvent(name, value);
 #endif
 }
 
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::UncheckedStringEvent(const char* name, const char* value) {
   if (!Log::IsEnabled()) return;
@@ skipping 1161 matching lines @@
   // Otherwise, if the sliding state window computation has not been
   // started we do it now.
   if (sliding_state_window_ == NULL) {
     sliding_state_window_ = new SlidingStateWindow();
   }
 #endif
 }
 
 
 } }  // namespace v8::internal