Remove strong mode support from property loads.

src/runtime/runtime-debug.cc

Index: src/runtime/runtime-debug.cc
diff --git a/src/runtime/runtime-debug.cc b/src/runtime/runtime-debug.cc
index 90c6e5053c64ae067be6d8026aa76d2d03ee56a9..2dfdc1bc72d7843ae345773ff3f9c8a508ddd0fe 100644
--- a/src/runtime/runtime-debug.cc
+++ b/src/runtime/runtime-debug.cc
@@ -82,7 +82,7 @@ static Handle<Object> DebugGetProperty(LookupIterator* it,
           return it->isolate()->factory()->undefined_value();
         }
         MaybeHandle<Object> maybe_result =
-            JSObject::GetPropertyWithAccessor(it, SLOPPY);
+            JSObject::GetPropertyWithAccessor(it);
         Handle<Object> result;
         if (!maybe_result.ToHandle(&result)) {
           result = handle(it->isolate()->pending_exception(), it->isolate());