Migrated several tests from blink to V8 repository.

test/webkit/dfg-ensure-contiguous-on-string.js

Index: test/webkit/dfg-ensure-contiguous-on-string.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-ensure-contiguous-on-string.js
similarity index 78%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-ensure-contiguous-on-string.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..a9e893771e04debaaae37db0258b8b60359fa9e7 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-ensure-contiguous-on-string.js
@@ -22,10 +22,22 @@
 // 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."
+"Checks that trying to arrayify a string doesn't crash."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(array) {
+    var result = 0;
+    for (var i = 0; i < array.length; ++i)
+        result += array[i];
+    return result;
+}
 
+var array = [1, 2, 3];
+for (var i = 0; i < 200; ++i)
+    shouldBe("foo(array)", "6");
 
+array = [1, false, 3];
+for (var i = 0; i < 1000; ++i)
+    shouldBe("foo(array)", "4");
+
+shouldBe("foo(\"hello\")", "\"0hello\"");