Upgrade V8 to 5.1.281.57  DO NOT MERGE

FPIIM-449

Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)
diff --git a/test/webkit/class-syntax-declaration.js b/test/webkit/class-syntax-declaration.js
index f8ecdbb..3c9aed7 100644
--- a/test/webkit/class-syntax-declaration.js
+++ b/test/webkit/class-syntax-declaration.js
@@ -21,7 +21,7 @@
 // (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: --harmony-sloppy --harmony-destructuring-bind
+// Flags: --harmony-sloppy
 
 description('Tests for ES6 class syntax declarations');