[tests] Use mock arraybuffer allocator in test to avoid huge allocation.

This sometimes caused problems with bots (for node too) because the
allocation could fail.

Bug: v8:6452
Change-Id: I346a9117eba8b6ed41566efeceaf7fb190784d76
Reviewed-on: https://chromium-review.googlesource.com/558075Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46373}

test/mjsunit/es6/typedarray-construct-offset-not-smi.js

@@ -2,18 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --mock-arraybuffer-allocator
 
 (function TestBufferByteLengthNonSmi() {
   var non_smi_byte_length = %_MaxSmi() + 1;
 
-  try {
-    var buffer = new ArrayBuffer(non_smi_byte_length);
-  } catch (e) {
-    // The ArrayBuffer allocation can fail on 32-bit archs, so no need to try to
-    // construct the typed array.
-    return;
-  }
+  var buffer = new ArrayBuffer(non_smi_byte_length);
+
   var arr = new Uint16Array(buffer);
 
   assertEquals(non_smi_byte_length, arr.byteLength);
@@ -26,33 +21,17 @@
 
 (function TestByteOffsetNonSmi() {
   var non_smi_byte_length = %_MaxSmi() + 11;
-  try {
-    var buffer = new ArrayBuffer(non_smi_byte_length);
-  } catch (e) {
-    // The ArrayBuffer allocation can fail on 32-bit archs, so no need to try to
-    // construct the typed array.
-    return;
-  }
-  print(buffer.byteLength);
+
+  var buffer = new ArrayBuffer(non_smi_byte_length);
+
   var whole = new Uint16Array(buffer);
-  whole[non_smi_byte_length / 2 - 1] = 1;
-  whole[non_smi_byte_length / 2 - 2] = 2;
-  whole[non_smi_byte_length / 2 - 3] = 3;
-  whole[non_smi_byte_length / 2 - 4] = 4;
-  whole[non_smi_byte_length / 2 - 5] = 5;
 
+  assertEquals(non_smi_byte_length, whole.byteLength);
   assertEquals(non_smi_byte_length / 2, whole.length);
-  assertEquals(1, whole[non_smi_byte_length / 2 - 1]);
 
   var arr = new Uint16Array(buffer, non_smi_byte_length - 10, 5);
 
   assertEquals(non_smi_byte_length, arr.buffer.byteLength);
   assertEquals(10, arr.byteLength);
   assertEquals(5, arr.length);
-
-  assertEquals(5, arr[0]);
-  assertEquals(4, arr[1]);
-  assertEquals(3, arr[2]);
-  assertEquals(2, arr[3]);
-  assertEquals(1, arr[4]);
 })();