Migrated several tests from blink to V8 repository.

test/webkit/dfg-dead-redundant-get-array-length.js

Index: test/webkit/dfg-dead-redundant-get-array-length.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-dead-redundant-get-array-length.js
similarity index 82%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-dead-redundant-get-array-length.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..b82874ffc33218d978e1a54b8d210164d51f7c8e 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-dead-redundant-get-array-length.js
@@ -22,10 +22,13 @@
 // 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."
+"Tests that having a dead, and redundant, use of array.length doesn't cause compiler crashes."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
-
+function foo(array) {
+    var x = array.length; // This is dead. If it wasn't, it would be redundant with the one below.
+    return array.length;
+}
 
+for (var i = 0; i < 128; ++i)
+    shouldBe("foo([1, 2, 3])", "3");