Allow recursive messages reporting as it is already used.

src/isolate.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 170 matching lines @@
   bool has_pending_message_;
   Object* pending_message_obj_;
   Script* pending_message_script_;
   int pending_message_start_pos_;
   int pending_message_end_pos_;
   // Use a separate value for scheduled exceptions to preserve the
   // invariants that hold about pending_exception.  We may want to
   // unify them later.
   MaybeObject* scheduled_exception_;
   bool external_caught_exception_;
-  // True if unhandled message is being currently reported by
-  // MessageHandler::ReportMessage.
-  bool in_exception_reporting_;
   SaveContext* save_context_;
   v8::TryCatch* catcher_;
 
   // Stack.
   Address c_entry_fp_;  // the frame pointer of the top c entry frame
   Address handler_;   // try-blocks are chained through the stack
 
 #ifdef USE_SIMULATOR
 #if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS)
   Simulator* simulator_;
@@ skipping 315 matching lines @@
   }
   v8::TryCatch* try_catch_handler() {
     return thread_local_top_.TryCatchHandler();
   }
   Address try_catch_handler_address() {
     return thread_local_top_.try_catch_handler_address();
   }
   bool* external_caught_exception_address() {
     return &thread_local_top_.external_caught_exception_;
   }
-  bool in_exception_reporting() {
-    return thread_local_top_.in_exception_reporting_;
-  }
-  void set_in_exception_reporting(bool value) {
-    thread_local_top_.in_exception_reporting_ = value;
-  }
   v8::TryCatch* catcher() {
     return thread_local_top_.catcher_;
   }
   void set_catcher(v8::TryCatch* catcher) {
     thread_local_top_.catcher_ = catcher;
   }
 
   MaybeObject** scheduled_exception_address() {
     return &thread_local_top_.scheduled_exception_;
   }
@@ skipping 795 matching lines @@
 
 } }  // namespace v8::internal
 
 // TODO(isolates): Get rid of these -inl.h includes and place them only where
 //                 they're needed.
 #include "allocation-inl.h"
 #include "zone-inl.h"
 #include "frames-inl.h"
 
 #endif  // V8_ISOLATE_H_