[debugger] sunset --expose-debug-as flag.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 1264ac0d4a3e778523622f4094c3dfd01300c7dd..e20baf0ec8e6975961807fb487cc88df78825f90 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -4076,25 +4076,6 @@ bool Genesis::InstallSpecialObjects(Handle<Context> native_context) {
   Handle<Smi> stack_trace_limit(Smi::FromInt(FLAG_stack_trace_limit), isolate);
   JSObject::AddProperty(Error, name, stack_trace_limit, NONE);
 
-  // Expose the debug global object in global if a name for it is specified.
-  if (FLAG_expose_debug_as != NULL && strlen(FLAG_expose_debug_as) != 0) {
-    // If loading fails we just bail out without installing the
-    // debugger but without tanking the whole context.
-    Debug* debug = isolate->debug();
-    if (!debug->Load()) return true;
-    Handle<Context> debug_context = debug->debug_context();
-    // Set the security token for the debugger context to the same as
-    // the shell native context to allow calling between these (otherwise
-    // exposing debug global object doesn't make much sense).
-    debug_context->set_security_token(native_context->security_token());
-    Handle<String> debug_string =
-        factory->InternalizeUtf8String(FLAG_expose_debug_as);
-    uint32_t index;
-    if (debug_string->AsArrayIndex(&index)) return true;
-    Handle<Object> global_proxy(debug_context->global_proxy(), isolate);
-    JSObject::AddProperty(global, debug_string, global_proxy, DONT_ENUM);
-  }
-
   WasmJs::Install(isolate, global);
 
   return true;