Migrated several tests from blink to V8 repository.

test/webkit/dfg-patchable-get-by-id-after-watchpoint.js

Index: test/webkit/dfg-patchable-get-by-id-after-watchpoint.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-patchable-get-by-id-after-watchpoint.js
similarity index 61%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-patchable-get-by-id-after-watchpoint.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..9866126ef09bafb7ca15f1b9a595ecb5f96a6215 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-patchable-get-by-id-after-watchpoint.js
@@ -22,10 +22,49 @@
 // 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 a patchable GetById right after a watchpoint has the appropriate nop padding."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(o, p) {
+    var a = p.f;
+    var b = o.f; // Watchpoint.
+    var c = p.g; // Patchable GetById.
+    return b(a + c);
+}
 
+function O() {
+}
+
+O.prototype.f = function(x) { return x + 1; };
+
+var o = new O();
+
+function P1() {
+}
+
+P1.prototype.g = 42;
+
+function P2() {
+}
+
+P2.prototype.g = 24;
+
+var p1 = new P1();
+var p2 = new P2();
+
+p1.f = 1;
+p2.f = 2;
+
+for (var i = 0; i < 200; ++i) {
+    var p = (i % 2) ? p1 : p2;
+    var expected = (i % 2) ? 44 : 27;
+    if (i == 150) {
+        // Cause first the watchpoint on o.f to fire, and then the GetById
+        // to be reset.
+        O.prototype.g = 57; // Fire the watchpoint.
+        P1.prototype.h = 58; // Reset the GetById.
+        P2.prototype.h = 59; // Not necessary, but what the heck - this resets the GetById even more.
+    }
+    shouldBe("foo(o, p)", "" + expected);
+}