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/webkit/const-without-initializer.js b/test/webkit/const-without-initializer.js
index 9eb0365..b1a86b9 100644
--- a/test/webkit/const-without-initializer.js
+++ b/test/webkit/const-without-initializer.js
@@ -21,6 +21,8 @@
 // (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: --legacy-const
+
 description(
 'Tests that declaring a const variable without initializing has the correct behavior and does not crash'
 );