Migrated several tests from blink to V8 repository.

test/webkit/dfg-proto-stub-watchpoint-fire.js

Index: test/webkit/dfg-proto-stub-watchpoint-fire.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-proto-stub-watchpoint-fire.js
similarity index 80%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-proto-stub-watchpoint-fire.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..45e9dbdb72dbbd27c27bfda63df34a4b18771546 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-proto-stub-watchpoint-fire.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."
+"Tests that we don't crash if a watchpoint on prototype access stubs is fired."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function A() { }
+function B() { }
 
+A.prototype.f = 42;
+B.prototype.f = 43;
 
+
+function foo(o) {
+    return o.f;
+}
+
+for (var i = 0; i < 200; ++i) {
+    if (i == 150)
+        A.prototype.g = 63;
+    shouldBe("foo((i % 2) ? new A() : new B())", "" + ((i % 2) ? 42 : 43));
+}