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 7e6807b0a9d3a28538a21a57839419fbb286d7db..a9d90968f1386663a358a87c18f09de2beea12e1 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -235,6 +235,8 @@ class ThreadLocalTop BASE_EMBEDDED {
   Context* context_;
   ThreadId thread_id_;
   MaybeObject* pending_exception_;
+  Object* last_traced_exception_;
+  JSArray* last_stack_trace_;
   bool has_pending_message_;
   Object* pending_message_obj_;
   Script* pending_message_script_;
@@ -564,6 +566,10 @@ class Isolate {
   void clear_pending_exception() {
     thread_local_top_.pending_exception_ = heap_.the_hole_value();
   }
+  void clear_last_stack_trace() {
+    thread_local_top_.last_traced_exception_ = heap_.the_hole_value();
+    thread_local_top_.last_stack_trace_ = NULL;
+  }
   MaybeObject** pending_exception_address() {
     return &thread_local_top_.pending_exception_;
   }
@@ -700,8 +706,7 @@ class Isolate {
   void PrintStack();
   Handle<String> StackTraceString();
   Handle<JSArray> CaptureCurrentStackTrace(
-      int frame_limit,
-      StackTrace::StackTraceOptions options);
+      int frame_limit, StackTrace::StackTraceOptions options);
 
   // Returns if the top context may access the given global object. If
   // the result is false, the pending exception is guaranteed to be