Return Object* instead of MaybeObject* from runtime calls.

src/debug.cc

 // Copyright 2012 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 1043 matching lines @@
         Builtins::kFrameDropper_LiveEdit);
     thread_local_.after_break_target_ = plain_return->entry();
   } else {
     UNREACHABLE();
   }
 
   return heap->undefined_value();
 }
 
 
-RUNTIME_FUNCTION(Object*, Debug_Break) {
+RUNTIME_FUNCTION(Debug_Break) {
   return isolate->debug()->Break(args);
 }
 
 
 // Check the break point objects for whether one or more are actually
 // triggered. This function returns a JSArray with the break point objects
 // which is triggered.
 Handle<Object> Debug::CheckBreakPoints(Handle<Object> break_point_objects) {
   Factory* factory = isolate_->factory();
 
@@ skipping 2660 matching lines @@
     {
       Locker locker(reinterpret_cast<v8::Isolate*>(isolate_));
       isolate_->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal