Upgrade V8 to version 4.9.385.28

https://chromium.googlesource.com/v8/v8/+/4.9.385.28

FPIIM-449

Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/test/mjsunit/compiler/regress-gvn.js b/test/mjsunit/compiler/regress-gvn.js
index 01b1aa9..7055e34 100644
--- a/test/mjsunit/compiler/regress-gvn.js
+++ b/test/mjsunit/compiler/regress-gvn.js
@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --noalways-opt --allow-natives-syntax
+// Flags: --allow-natives-syntax
 //
 // Regression test for global value numbering.