Preserve error message during finally block in try..finally.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 9aa1242f35de0ad13e9eafd17312327f9ab91be2..2aa6cdf68886afbdcf4459205eede832a07c1629 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -578,6 +578,11 @@ class Isolate {
   MaybeObject** scheduled_exception_address() {
     return &thread_local_top_.scheduled_exception_;
   }
+
+  Address pending_message_obj_address() {
+    return reinterpret_cast<Address>(&thread_local_top_.pending_message_obj_);
+  }
+
   MaybeObject* scheduled_exception() {
     ASSERT(has_scheduled_exception());
     return thread_local_top_.scheduled_exception_;
@@ -708,7 +713,7 @@ class Isolate {
   // Re-throw an exception.  This involves no error reporting since
   // error reporting was handled when the exception was thrown
   // originally.
-  Failure* ReThrow(MaybeObject* exception, MessageLocation* location = NULL);
+  Failure* ReThrow(MaybeObject* exception);
   void ScheduleThrow(Object* exception);
   void ReportPendingMessages();
   Failure* ThrowIllegalOperation();