Update V8 to r7079 as required by WebKit r80534.

Change-Id: I487c152e485d5a40b68997d7c0d2f1fba5da0834
diff --git a/src/ia32/simulator-ia32.h b/src/ia32/simulator-ia32.h
index 88d0b61..43b7ea3 100644
--- a/src/ia32/simulator-ia32.h
+++ b/src/ia32/simulator-ia32.h
@@ -38,10 +38,15 @@
 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
   (entry(p0, p1, p2, p3, p4))
 
-// Call the generated regexp code directly. The entry function pointer should
+
+typedef int (*regexp_matcher)(String*, int, const byte*,
+                              const byte*, int*, Address, int);
+
+// Call the generated regexp code directly. The code at the entry address should
 // expect seven int/pointer sized arguments and return an int.
 #define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \
-  (entry(p0, p1, p2, p3, p4, p5, p6))
+  (FUNCTION_CAST<regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6))
+
 
 #define TRY_CATCH_FROM_ADDRESS(try_catch_address) \
   (reinterpret_cast<TryCatch*>(try_catch_address))