Migrated several tests from blink to V8 repository.

test/webkit/dfg-arrayify-elimination.js

Index: test/webkit/dfg-arrayify-elimination.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-arrayify-elimination.js
similarity index 82%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-arrayify-elimination.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..3ac57d09034831d3967b79b17699933cccb407a2 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-arrayify-elimination.js
@@ -21,11 +21,19 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-description(
-"Tests the behavior of Array.prototype.concat while the array is having a bad time due to one of the elements we are concatenating."
-);
-
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
-
+function foo(a, i, j, k) {
+    a[i] = 42;
+    a[j] = 43;
+    a[k] = 44;
+}
 
+for (var i = 0; i < 1000; ++i) {
+    var array = [];
+    if (i % 2)
+        array.unshift(52);
+    foo(array, 1, 2, 3);
+    if (i % 2)
+        shouldBe("array", "[52,42,43,44]");
+    else
+        shouldBe("array", "[,42,43,44]");
+}