Update V8 to r3431 as required by WebKit r51976.

Change-Id: I567392c3f8c0a0d5201a4249611ac4ccf468cd5b
diff --git a/test/mjsunit/parse-int-float.js b/test/mjsunit/parse-int-float.js
index ad2275e..b9620ff 100644
--- a/test/mjsunit/parse-int-float.js
+++ b/test/mjsunit/parse-int-float.js
@@ -36,9 +36,12 @@
 
 assertEquals(3, parseInt('11', 2));
 assertEquals(4, parseInt('11', 3));
+assertEquals(4, parseInt('11', 3.8));
 
 assertEquals(0x12, parseInt('0x12'));
 assertEquals(0x12, parseInt('0x12', 16));
+assertEquals(0x12, parseInt('0x12', 16.1));
+assertEquals(0x12, parseInt('0x12', NaN));
 
 assertEquals(12, parseInt('12aaa'));