Migrated several tests from blink to V8 repository.

test/webkit/isPrototypeOf.js

Index: test/webkit/isPrototypeOf.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/isPrototypeOf.js
similarity index 75%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/isPrototypeOf.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..6cbc8c8947fb676f4523dcfdf1f0eb1fe6e26e4c 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/isPrototypeOf.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 tests that isPrototypeOf works according to the ECMA spec."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+shouldBeFalse("Object.isPrototypeOf('string')");
+shouldBeTrue("Array.prototype.isPrototypeOf(new Array())");
 
+function ObjectA() { }
+function ObjectB() { }
+ObjectB.prototype = new ObjectA();
+var objb = new ObjectB();
+shouldBeTrue("ObjectA.prototype.isPrototypeOf(objb)");
 
+function ObjectC() {}
+ObjectC.prototype = new ObjectB();
+var objc = new ObjectC();
+shouldBeTrue("ObjectA.prototype.isPrototypeOf(objc)");