Report approximated duration in milliseconds for profile nodes.

src/log.h

 // Copyright 2006-2008 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 250 matching lines @@
   // Logs all compiled JSFunction objects found in the heap.
   static void LogFunctionObjects();
   // Logs all accessor callbacks found in the heap.
   static void LogAccessorCallbacks();
   // Used for logging stubs found in the snapshot.
   static void LogCodeObjects();
 
   // Converts tag to a corresponding NATIVE_... if the script is native.
   INLINE(static LogEventsAndTags ToNativeByScript(LogEventsAndTags, Script*));
 
- private:
-
   // Profiler's sampling interval (in milliseconds).
   static const int kSamplingIntervalMs = 1;
 
+ private:
+
   // Size of window used for log records compression.
   static const int kCompressionWindowSize = 4;
 
   // Emits the profiler's first message.
   static void ProfilerBeginEvent();
 
   // Emits callback event messages.
   static void CallbackEventInternal(const char* prefix,
                                     const char* name,
                                     Address entry_point);
@@ skipping 77 matching lines @@
 // Class that extracts stack trace, used for profiling.
 class StackTracer : public AllStatic {
  public:
   static void Trace(TickSample* sample);
 };
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LOG_H_