Migrate more tests from blink repository.

test/webkit/fast/js/kde/delete.js

Index: test/webkit/fast/js/kde/delete.js
diff --git a/test/webkit/declaration-in-block.js b/test/webkit/fast/js/kde/delete.js
similarity index 91%
copy from test/webkit/declaration-in-block.js
copy to test/webkit/fast/js/kde/delete.js
index 39c4fc06ce7958ba0d4c2f77e9faede8d67370d3..0acb308de4111c5e8e0159b0017cbf9fe6c85119 100644
--- a/test/webkit/declaration-in-block.js
+++ b/test/webkit/fast/js/kde/delete.js
@@ -21,9 +21,7 @@
 // (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(
-"This test checks that declarations in an if block can be seen outside it."
-);
-
-if (0) { var b; }
-var a = b;
+description("KDE JS Test");
+shouldBe("a = 1; delete a;", "true");
+shouldBe("delete nonexistant;", "true");
+shouldBe("delete NaN", "false");