Changed computation of func.caller to skip some built-in functions.

test/mjsunit/function-caller.js

Index: test/mjsunit/function-caller.js
diff --git a/test/mjsunit/function-caller.js b/test/mjsunit/function-caller.js
index ddc7b5df28279afd54360ce6f10046b38ab9ec0d..bc01750f9351d48f6b7da633397ef38bb714c5fe 100644
--- a/test/mjsunit/function-caller.js
+++ b/test/mjsunit/function-caller.js
@@ -46,3 +46,10 @@ f(null);
 // Check called from eval.
 eval('f(null)');
 
+// Check called from builtin functions. Only show the initially called
+// (publicly exposed) builtin function, not it's internal helper functions.
+[Array.prototype.sort, Array.prototype.sort].sort(f);
+
+"abel".replace(/b/g, function h() {
+   assertEquals(String.prototype.replace, h.caller);
+});