Migrated several tests from blink to V8 repository.

test/webkit/dfg-put-scoped-var-backward-flow.js

Index: test/webkit/dfg-put-scoped-var-backward-flow.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-put-scoped-var-backward-flow.js
similarity index 82%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-put-scoped-var-backward-flow.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..9f3bfd36b9b3275639869812497059bf6bebe069 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-put-scoped-var-backward-flow.js
@@ -22,10 +22,17 @@
 // 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 the DFG treats the operand to PutScopedVar as escaping in an unconstrained way."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function sum(nums) {
+    var total = 0;
+    nums.forEach(function (num) {
+        total += num;
+    });
+    return total;
+}
 
+for (var i = 0; i < 200; ++i)
+    shouldBe("sum([2147483646, 2147483644])", "4294967290");