When rethrowing an exception, print the stack trace of its original site instead of rethrow site.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 0e59903454a043844f36045cacdd514b7f03d6f7..295adca2751ff13276b330ebe949a399e51e2181 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -703,6 +703,8 @@ class Isolate {
       int frame_limit,
       StackTrace::StackTraceOptions options);
 
+  void CaptureAndSetCurrentStackTraceFor(Handle<JSObject> error_object);
+
   // Returns if the top context may access the given global object. If
   // the result is false, the pending exception is guaranteed to be
   // set.
@@ -729,7 +731,7 @@ class Isolate {
 
   // Promote a scheduled exception to pending. Asserts has_scheduled_exception.
   Failure* PromoteScheduledException();
-  void DoThrow(MaybeObject* exception, MessageLocation* location);
+  void DoThrow(Object* exception, MessageLocation* location);
   // Checks if exception should be reported and finds out if it's
   // caught externally.
   bool ShouldReportException(bool* can_be_caught_externally,
@@ -1141,6 +1143,10 @@ class Isolate {
 
   void InitializeDebugger();
 
+  // Traverse prototype chain to find out whether the object is derived from
+  // the Error object.
+  bool IsErrorObject(Handle<Object> obj);
+
   int stack_trace_nesting_level_;
   StringStream* incomplete_message_;
   // The preallocated memory thread singleton.