[es6] implement Reflect.apply() & Reflect.construct()

src/macros.py

Index: src/macros.py
diff --git a/src/macros.py b/src/macros.py
index 93a5563c19ddaa7e0afcea891993afd722c753ba..dd773dea7d9922f22b435abc201e8e3495444e55 100644
--- a/src/macros.py
+++ b/src/macros.py
@@ -69,6 +69,11 @@ const kMaxYear  = 1000000;
 const kMinMonth = -10000000;
 const kMaxMonth = 10000000;
 
+# Safe maximum number of arguments to push to stack, when multiplied by
+# pointer size. Used by Function.prototype.apply(), Reflect.apply() and
+# Reflect.construct().
+const kSafeArgumentsLength = 0x800000;
+
 # Strict mode flags for passing to %SetProperty
 const kSloppyMode = 0;
 const kStrictMode = 1;