Update V8 to r3121 as required for WebKit update.
Change-Id: Ic53e0aef9a9eb9b71ee7d25a8aef61520bba899c
diff --git a/src/macros.py b/src/macros.py
index c75f0ea..ddd2f13 100644
--- a/src/macros.py
+++ b/src/macros.py
@@ -118,9 +118,7 @@
# a type error is thrown.
macro DATE_VALUE(arg) = (%_ClassOf(arg) === 'Date' ? %_ValueOf(arg) : ThrowDateTypeError());
-# Last input and last subject are after the captures so we can omit them on
-# results returned from global searches. Beware - these evaluate their
-# arguments twice.
+# Last input and last subject of regexp matches.
macro LAST_SUBJECT(array) = ((array)[1]);
macro LAST_INPUT(array) = ((array)[2]);