Migrated several tests from blink to V8 repository.

test/webkit/toString-recursion.js

Index: test/webkit/toString-recursion.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/toString-recursion.js
similarity index 78%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/toString-recursion.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..51e9f98c2d28665b9a969aa801aacad83c548856 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/toString-recursion.js
@@ -22,10 +22,14 @@
 // 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 toString() does not have a problem when an object has itself as a property."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+// Array (elements)
+shouldBe("var array = []; array[0] = array; array + ''", "''");
 
+// Error (name, message)
+shouldBe("var error = new Error; error.name = error; error.message = error; error + ''", "''");
 
+// RegExp (source)
+shouldBe("var regexp = /a/; regexp.source = regexp; regexp + ''", "'/a/'");