Pass undefined to JS builtins when called with implicit receiver.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 4eb33e2976f3634412a1f311015f8f700244ed04..a02ed1d777b5ddc22d25d83b6e4b79fafd17bdab 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -89,6 +89,12 @@ class CompilationInfo BASE_EMBEDDED {
   bool allows_natives_syntax() const {
     return IsNativesSyntaxAllowed::decode(flags_);
   }
+  void MarkAsES5Native() {

[Lasse Reichstein, 2011/05/26 08:26:55]

Why ES5Native and not just Native?
Is there any native code that isn't ES5Native?

[Mads Ager (chromium), 2011/05/26 10:14:07]

Following naming elsewhere to not have two names for this. I'll rename them all
to remove the es5 part. Having the current spec version in the name is not such
a great idea. :-)

+    flags_ |= IsES5Native::encode(true);
+  }
+  bool is_es5_native() const {
+    return IsES5Native::decode(flags_);
+  }
   void SetFunction(FunctionLiteral* literal) {
     ASSERT(function_ == NULL);
     function_ = literal;
@@ -167,9 +173,11 @@ class CompilationInfo BASE_EMBEDDED {
 
   void Initialize(Mode mode) {
     mode_ = V8::UseCrankshaft() ? mode : NONOPT;
-    if (!shared_info_.is_null() && shared_info_->strict_mode()) {
-      MarkAsStrictMode();
+    if (!shared_info_.is_null()) {
+      if (shared_info_->strict_mode()) MarkAsStrictMode();
+      if (shared_info_->es5_native()) MarkAsES5Native();
     }
+
   }
 
   void SetMode(Mode mode) {
@@ -191,6 +199,9 @@ class CompilationInfo BASE_EMBEDDED {
   class IsStrictMode: public BitField<bool, 4, 1> {};
   // Native syntax (%-stuff) allowed?
   class IsNativesSyntaxAllowed: public BitField<bool, 5, 1> {};
+  // Is this a function from our natives.
+  class IsES5Native: public BitField<bool, 6, 1> {};
+
 
   unsigned flags_;