Make debugger unloading deferred operation

test/cctest/test-debug.cc

 // Copyright 2007-2008 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 425 matching lines @@
     }
   }
 }
 
 
 } }  // namespace v8::internal
 
 
 // Check that the debugger has been fully unloaded.
 static void CheckDebuggerUnloaded(bool check_functions = false) {
+  // Let debugger to unload itself synchronously
+  v8::Debug::ProcessDebugMessages();
+
   v8::internal::CheckDebuggerUnloaded(check_functions);
 }
 
 
 // Inherit from BreakLocationIterator to get access to protected parts for
 // testing.
 class TestBreakLocationIterator: public v8::internal::BreakLocationIterator {
  public:
   explicit TestBreakLocationIterator(Handle<v8::internal::DebugInfo> debug_info)
     : BreakLocationIterator(debug_info, v8::internal::SOURCE_BREAK_LOCATIONS) {}
@@ skipping 5368 matching lines @@
 
   break_point_hit_count = 0;
   foo->Call(env->Global(), 0, NULL);
   CHECK_EQ(1, break_point_hit_count);
 
   v8::Debug::SetDebugEventListener(NULL);
   debugee_context = v8::Handle<v8::Context>();
   debugger_context = v8::Handle<v8::Context>();
   CheckDebuggerUnloaded();
 }