Migrated several tests from blink to V8 repository.

test/webkit/reentrant-call-unwind.js

Index: test/webkit/reentrant-call-unwind.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/reentrant-call-unwind.js
similarity index 80%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/reentrant-call-unwind.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..9d4beb6348fa4982461c5d16c8ab38172c0f4eed 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/reentrant-call-unwind.js
@@ -22,10 +22,19 @@
 // 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."
+"This test checks that unwinding of exceptions properly copies registers of activation frames created by reentrant calls to JavaScript."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
-
+var f;
 
+try {
+    (function() {
+        var j = 0;
+        f = function() { return j; };
+        throw new Object();
+    }).apply();
+} catch (e) {
+    (function() {
+        shouldBe("f()", "0");
+    }).apply();
+}