Do not expose termination exceptions to the Exception API.

src/execution.h

Index: src/execution.h
diff --git a/src/execution.h b/src/execution.h
index 2a41bb8ba0d68a1fba217f5f3f301d9fa072294a..9af446b84b1caa432bcdcd1aea22f4a52a36a421 100644
--- a/src/execution.h
+++ b/src/execution.h
@@ -46,12 +46,12 @@ class Execution V8_FINAL : public AllStatic {
   // any thrown exceptions. The return value is either the result of
   // calling the function (if caught exception is false) or the exception
   // that occurred (if caught exception is true).
-  static MaybeHandle<Object> TryCall(
-      Handle<JSFunction> func,
-      Handle<Object> receiver,
-      int argc,
-      Handle<Object> argv[],
-      Handle<Object>* exception_out = NULL);
+  // In the exception case, exception_out holds the caught exceptions, unless
+  // it is a termination exception.
+  static MaybeHandle<Object> TryCall(Handle<JSFunction> func,
+                                     Handle<Object> receiver, int argc,
+                                     Handle<Object> argv[],
+                                     MaybeHandle<Object>* exception_out = NULL);
 
   // ECMA-262 9.3
   MUST_USE_RESULT static MaybeHandle<Object> ToNumber(