[runtime] [proxy] implementing [[Get]] trap.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 578ca4e877f25e1af709fbd5d0cb94c13c506324..0148702e61fd40c03da49ad324f0bc97d3b84b6d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -9527,6 +9527,11 @@ class JSProxy: public JSReceiver {
                                                  Handle<JSProxy> proxy,
                                                  Handle<Name> name);
 
+  // ES6 9.5.8
+  MUST_USE_RESULT static MaybeHandle<Object> GetProperty(
+      Isolate* isolate, Handle<JSProxy> proxy, Handle<Name> name,
+      Handle<Object> receiver, LanguageMode language_mode);
+
   // ES6 9.5.10 (when passed SLOPPY)
   MUST_USE_RESULT static Maybe<bool> DeletePropertyOrElement(
       Handle<JSProxy> proxy, Handle<Name> name, LanguageMode language_mode);
@@ -9541,11 +9546,6 @@ class JSProxy: public JSReceiver {
                               Enumerability enum_policy,
                               KeyAccumulator* accumulator);
 
-  MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithHandler(
-      Handle<JSProxy> proxy,
-      Handle<Object> receiver,
-      Handle<Name> name);
-
   // If the handler defines an accessor property with a setter, invoke it.
   // If it defines an accessor property without a setter, or a data property
   // that is read-only, fail.  In all these cases set '*done' to true.