Minor Native Client specific changes to files in src.

src/v8utils.h

Index: src/v8utils.h
diff --git a/src/v8utils.h b/src/v8utils.h
index b5c8f084e02b95785e177846b70e8c4c9fe97612..0dbd60e21448d21712501007b7103aebb7b5d083 100644
--- a/src/v8utils.h
+++ b/src/v8utils.h
@@ -185,6 +185,13 @@ inline void MemsetPointer(T** dest, U* value, int counter) {
 #elif defined(V8_HOST_ARCH_X64)
 #define STOS "stosq"
 #endif
+#if defined(__native_client__)
+  // This STOS sequence does not validate for x86_64 Native Client.
+  // Here we #undef STOS to force use of the slower C version.
+  // TODO(bradchen): Profile V8 and implement a faster REP STOS
+  // here if the profile indicates it matters.
+#undef STOS
+#endif
 
 #if defined(__GNUC__) && defined(STOS)
   asm volatile(