Implement function proxies (except for their use as constructors).

src/runtime.h

Index: src/runtime.h
diff --git a/src/runtime.h b/src/runtime.h
index a52672ad7d999d81b0b40baecb49556cc53e0a8c..1c66e26548efc75d1abb8544ffff7500d8b22079 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -79,6 +79,7 @@ namespace internal {
   F(PreventExtensions, 1, 1)\
   \
   /* Utilities */ \
+  F(Apply, 5, 1) \
   F(GetFunctionDelegate, 1, 1) \
   F(GetConstructorDelegate, 1, 1) \
   F(NewArgumentsFast, 3, 1) \
@@ -286,8 +287,12 @@ namespace internal {
   \
   /* Harmony proxies */ \
   F(CreateJSProxy, 2, 1) \
+  F(CreateJSFunctionProxy, 4, 1) \
   F(IsJSProxy, 1, 1) \
+  F(IsJSFunctionProxy, 1, 1) \
   F(GetHandler, 1, 1) \
+  F(GetCallTrap, 1, 1) \
+  F(GetConstructTrap, 1, 1) \
   F(Fix, 1, 1) \
   \
   /* Harmony weakmaps */ \