Revert "V8 can clear exception pending message, when should not do this."

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 426a7389217134aab419458cf2e585c4917d41e0..a52cfb5fdd111cf1adfd6b0a398c4aa5e7386f3e 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -604,8 +604,7 @@ class Isolate {
     thread_local_top_.scheduled_exception_ = heap_.the_hole_value();
   }
 
-  bool HasExternalTryCatch();
-  bool IsFinallyOnTop();
+  bool IsExternallyCaught();
 
   bool is_catchable_by_javascript(Object* exception) {
     return exception != heap()->termination_exception();
@@ -1180,10 +1179,7 @@ class Isolate {
 
   void FillCache();
 
-  // Propagate pending exception message to the v8::TryCatch.
-  // If there is no external try-catch or message was successfully propagated,
-  // then return true.
-  bool PropagatePendingExceptionToExternalTryCatch();
+  void PropagatePendingExceptionToExternalTryCatch();
 
   // Traverse prototype chain to find out whether the object is derived from
   // the Error object.