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

src/full-codegen.h

Index: src/full-codegen.h
diff --git a/src/full-codegen.h b/src/full-codegen.h
index 2a6b7057c409c04f80348a5df504cb5f502c2e0e..60403f9119ecd958f729d49e33b9934f25591b31 100644
--- a/src/full-codegen.h
+++ b/src/full-codegen.h
@@ -528,6 +528,9 @@ class FullCodeGenerator: public AstVisitor {
   void EnterFinallyBlock();
   void ExitFinallyBlock();
 
+  void SavePendingMessage();
+  void RestorePendingMessage();
+
   // Loop nesting counter.
   int loop_depth() { return loop_depth_; }
   void increment_loop_depth() { loop_depth_++; }