Expose SIMD.Float32x4 type to Javascript.

test/mjsunit/object-toprimitive.js

Index: test/mjsunit/object-toprimitive.js
diff --git a/test/mjsunit/object-toprimitive.js b/test/mjsunit/object-toprimitive.js
index 34803ec93482668a13b3ec27303054505110ab93..cd0656c5c9d9185b9177f9c6896704ff6456f40e 100644
--- a/test/mjsunit/object-toprimitive.js
+++ b/test/mjsunit/object-toprimitive.js
@@ -25,6 +25,8 @@
 // (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: --harmony-simd
+
 // Test the ToPrimitive internal function used by ToNumber/ToString.
 // Does it [[Get]] and [[Call]] the object's toString and valueOf properties
 // correctly. Specifically, does it call [[Get]] only once per property.
@@ -104,3 +106,5 @@ assertEquals(87, nt);
 assertEquals(["gvo", "gts", "ts"], trace);
 
 assertThrows('Number(Symbol())', TypeError);
+
+assertThrows('Number(SIMD.float32x4(1, 2, 3, 4))', TypeError);