Report approximated duration in milliseconds for profile nodes.

src/log.h

Index: src/log.h
diff --git a/src/log.h b/src/log.h
index ea9dc81e83deb572ec23a8f922fb6b5569536dc7..a1441ac16317d98f7a2b5cb4620c16c9b8757848 100644
--- a/src/log.h
+++ b/src/log.h
@@ -268,11 +268,11 @@ class Logger {
   // 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;