Revert of Fix bug when transferring SharedArrayBuffer to multiple Workers.

test/mjsunit/d8-worker-sharedarraybuffer.js

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 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (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-sharedarraybuffer --harmony-atomics
 
+var workerScript =
+  `onmessage = function(m) {
+   var sab = m;
+   var ta = new Uint32Array(sab);
+   if (sab.byteLength !== 16) {
+     throw new Error('SharedArrayBuffer transfer byteLength');
+   }
+   for (var i = 0; i < 4; ++i) {
+     if (ta[i] !== i) {
+       throw new Error('SharedArrayBuffer transfer value ' + i);
+     }
+   }
+    // Atomically update ta[0]
+    Atomics.store(ta, 0, 100);
+  };`;
+
 if (this.Worker) {
+  var w = new Worker(workerScript);
 
-  (function TestTransfer() {
-    var workerScript =
-      `onmessage = function(m) {
-       var sab = m;
-       var ta = new Uint32Array(sab);
-       if (sab.byteLength !== 16) {
-         throw new Error('SharedArrayBuffer transfer byteLength');
-       }
-       for (var i = 0; i < 4; ++i) {
-         if (ta[i] !== i) {
-           throw new Error('SharedArrayBuffer transfer value ' + i);
-         }
-       }
-        // Atomically update ta[0]
-        Atomics.store(ta, 0, 100);
-      };`;
+  var sab = new SharedArrayBuffer(16);
+  var ta = new Uint32Array(sab);
+  for (var i = 0; i < 4; ++i) {
+    ta[i] = i;
+  }
 
-    var w = new Worker(workerScript);
+  // Transfer SharedArrayBuffer
+  w.postMessage(sab, [sab]);
+  assertEquals(16, sab.byteLength);  // ArrayBuffer should not be neutered.
 
-    var sab = new SharedArrayBuffer(16);
-    var ta = new Uint32Array(sab);
-    for (var i = 0; i < 4; ++i) {
-      ta[i] = i;
-    }
+  // Spinwait for the worker to update ta[0]
+  var ta0;
+  while ((ta0 = Atomics.load(ta, 0)) == 0) {}
 
-    // Transfer SharedArrayBuffer
-    w.postMessage(sab, [sab]);
-    assertEquals(16, sab.byteLength);  // ArrayBuffer should not be neutered.
+  assertEquals(100, ta0);
 
-    // Spinwait for the worker to update ta[0]
-    var ta0;
-    while ((ta0 = Atomics.load(ta, 0)) == 0) {}
+  w.terminate();
 
-    assertEquals(100, ta0);
-
-    w.terminate();
-
-    assertEquals(16, sab.byteLength);  // Still not neutered.
-  })();
-
-  (function TestTransferMulti() {
-    var workerScript =
-      `onmessage = function(msg) {
-       var sab = msg.sab;
-       var id = msg.id;
-       var ta = new Uint32Array(sab);
-       Atomics.store(ta, id, 1);
-       postMessage(id);
-      };`;
-
-    var sab = new SharedArrayBuffer(16);
-    var ta = new Uint32Array(sab);
-
-    var id;
-    var workers = [];
-    for (id = 0; id < 4; ++id) {
-      workers[id] = new Worker(workerScript);
-      workers[id].postMessage({sab: sab, id: id}, [sab]);
-    }
-
-    // Spinwait for each worker to update ta[id]
-    var count = 0;
-    while (count < 4) {
-      for (id = 0; id < 4; ++id) {
-        if (Atomics.compareExchange(ta, id, 1, -1) == 1) {
-          // Worker is finished.
-          assertEquals(id, workers[id].getMessage());
-          workers[id].terminate();
-          count++;
-        }
-      }
-    }
-  })();
-
+  assertEquals(16, sab.byteLength);  // Still not neutered.
 }