[runtime] Unify the ToObject handling.

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.h"
 #include "src/debug/debug-evaluate.h"
 #include "src/debug/debug-frames.h"
@@ skipping 684 matching lines @@
   }
 
   // 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()->IsBuiltin());
-  if (!receiver->IsJSObject() && is_sloppy(shared->language_mode())) {
-    // If the receiver is not a JSObject and the function is not a builtin or
-    // strict-mode we have hit an optimization where a value object is not
-    // converted into a wrapped JS objects. To hide this optimization from the
-    // debugger, we wrap the receiver by creating correct wrapper object based
-    // on the function's native context.
-    // See ECMA-262 6.0, 9.2.1.2, 6 b iii.
-    if (receiver->IsUndefined()) {
-      receiver = handle(function->global_proxy());
-    } else {
-      Context* context = function->context();
-      Handle<Context> native_context(Context::cast(context->native_context()));
-      if (!Object::ToObject(isolate, receiver, native_context)
-               .ToHandle(&receiver)) {
-        // This only happens if the receiver is forcibly set in %_CallFunction.
-        return heap->undefined_value();
-      }
-    }
-  }
+  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);
   DCHECK(args.length() == 2);
@@ skipping 953 matching lines @@
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 }  // namespace internal
 }  // namespace v8