Revert of Refactor SharedFunctionInfo::IsBuiltin.

src/runtime/runtime-debug.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/debug/debug-evaluate.h"
 #include "src/debug/debug-frames.h"
 #include "src/debug/debug-scopes.h"
@@ skipping 748 matching lines @@
   // Add locals name and value from the temporary copy from the function frame.
   for (const auto& local : locals) details->set(details_index++, *local);
 
   // Add the value being returned.
   if (at_return) {
     details->set(details_index++, *return_value);
   }
 
   // Add the receiver (same as in function frame).
   Handle<Object> receiver(it.frame()->receiver(), isolate);
-  DCHECK(function->shared()->IsUserJavaScript());
+  DCHECK(!function->shared()->IsBuiltin());
   DCHECK_IMPLIES(is_sloppy(shared->language_mode()), receiver->IsJSReceiver());
   details->set(kFrameDetailsReceiverIndex, *receiver);
 
   DCHECK_EQ(details_size, details_index);
   return *isolate->factory()->NewJSArrayWithElements(details);
 }
 
 
 RUNTIME_FUNCTION(Runtime_GetScopeCount) {
   HandleScope scope(isolate);
@@ skipping 1143 matching lines @@
   Handle<Script> script = Handle<Script>(Script::cast(script_val->value()));
 
   Handle<WasmDebugInfo> debug_info =
       wasm::GetDebugInfo(handle(script->wasm_instance(), isolate));
   return *WasmDebugInfo::DisassembleFunction(debug_info,
                                              script->wasm_function_index());
 }
 
 }  // namespace internal
 }  // namespace v8