[runtime] support new Proxy() instead of Proxy.create and install getPrototypeOf trap

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index e135bd2dd1c4dcbf3d6a2123a3b0824d082edf3d..38f5b7d503d8d2669058e4c580d6203f0f36500d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1306,8 +1306,8 @@ class Object {
       Handle<Object> value, LanguageMode language_mode);
 
   // Get the first non-hidden prototype.
-  static inline Handle<Object> GetPrototype(Isolate* isolate,
-                                            Handle<Object> receiver);
+  static inline MaybeHandle<Object> GetPrototype(Isolate* isolate,
+                                                 Handle<Object> receiver);
 
   bool HasInPrototypeChain(Isolate* isolate, Object* object);
 
@@ -1917,6 +1917,8 @@ class JSReceiver: public HeapObject {
   MUST_USE_RESULT static Maybe<bool> PreventExtensions(
       Handle<JSReceiver> object, ShouldThrow should_throw);
 
+  MUST_USE_RESULT static Maybe<bool> IsExtensible(Handle<JSReceiver> object);
+
   // Tests for the fast common case for property enumeration.
   bool IsSimpleEnum();
 
@@ -9565,17 +9567,19 @@ class WeakCell : public HeapObject {
 // The JSProxy describes EcmaScript Harmony proxies
 class JSProxy: public JSReceiver {
  public:
-  // [target]: The target property.
-  DECL_ACCESSORS(target, Object)
-
   // [handler]: The handler property.
   DECL_ACCESSORS(handler, Object)
-
+  // [target]: The target property.
+  DECL_ACCESSORS(target, Object)
   // [hash]: The hash code property (undefined if not initialized yet).
   DECL_ACCESSORS(hash, Object)
 
+  inline bool has_handler();
+
   DECLARE_CAST(JSProxy)
 
+  static MaybeHandle<Object> GetPrototype(Handle<JSProxy> receiver);
+
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithHandler(
       Handle<JSProxy> proxy,
       Handle<Object> receiver,
@@ -9613,6 +9617,10 @@ class JSProxy: public JSReceiver {
 
   typedef FixedBodyDescriptor<kTargetOffset, kSize, kSize> BodyDescriptor;
 
+  MUST_USE_RESULT Object* GetIdentityHash();
+
+  static Handle<Smi> GetOrCreateIdentityHash(Handle<JSProxy> proxy);
+
  private:
   friend class JSReceiver;
 
@@ -9628,10 +9636,6 @@ class JSProxy: public JSReceiver {
   MUST_USE_RESULT static MaybeHandle<Object> DeletePropertyWithHandler(
       Handle<JSProxy> proxy, Handle<Name> name, LanguageMode language_mode);
 
-  MUST_USE_RESULT Object* GetIdentityHash();
-
-  static Handle<Smi> GetOrCreateIdentityHash(Handle<JSProxy> proxy);
-
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSProxy);
 };