Debugger: load debugger builtins as normal native JS.

src/debug/debug-evaluate.cc

Index: src/debug/debug-evaluate.cc
diff --git a/src/debug/debug-evaluate.cc b/src/debug/debug-evaluate.cc
index a7d73256ea9e9cf44b27c1faa9db79884c151f20..27935ba87e53e985770d3438219d3c36d8b6f76a 100644
--- a/src/debug/debug-evaluate.cc
+++ b/src/debug/debug-evaluate.cc
@@ -14,12 +14,8 @@
 namespace v8 {
 namespace internal {
 
-
 static inline bool IsDebugContext(Isolate* isolate, Context* context) {
-  // Try to unwrap script context if it exist.
-  if (context->IsScriptContext()) context = context->previous();
-  DCHECK_NOT_NULL(context);
-  return context == *isolate->debug()->debug_context();
+  return context->native_context() == *isolate->debug()->debug_context();
 }