Migrated several tests from blink to V8 repository.

test/webkit/dfg-branch-not-fail.js

Index: test/webkit/dfg-branch-not-fail.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-branch-not-fail.js
similarity index 71%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-branch-not-fail.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..af7ba970525c6cb3f0fd358066efb183f2f9ac27 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-branch-not-fail.js
@@ -22,10 +22,33 @@
 // 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."
+"Check that short-circuiting Branch(LogicalNot(@a)) and then failing speculation does not result in the branch being taken the wrong way."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(a) {
+    if (a.f)
+        return 1;
+    return 0;
+}
 
+function bar(a) {
+    var b = !a.f;
+    if (b)
+        return 1;
+    return 0;
+}
+
+var True = true;
+var False = false;
+for (var i = 0; i < 200; ++i) {
+    var x;
+    if (i == 100) {
+        True = "string";
+        False = void 0;
+    }
+    shouldBe("foo({f:True})", "1");
+    shouldBe("foo({f:False})", "0");
+    shouldBe("bar({f:True})", "0");
+    shouldBe("bar({f:False})", "1");
+}