Migrated several tests from blink to V8 repository.

test/webkit/dfg-inline-constant.js

Index: test/webkit/dfg-inline-constant.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-inline-constant.js
similarity index 77%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-inline-constant.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..8c7f7eb63b81646d0c7b1d703cc205d3ffe9b5ad 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-inline-constant.js
@@ -22,10 +22,23 @@
 // 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 function inlining in the DFG JIT doesn't get confused by constants being reused between inliner and inlinee."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(a, b) {
+    if (b)
+        return a + 4;
+    return b + 5;
+}
 
+function bar(a, b) {
+    return foo(a, b) + 5;
+}
 
+for (var i = 0; i < 1000; ++i)
+    bar(i, i + 1);
+
+shouldBe("bar(6, 0)", "10");
+shouldBe("bar(6, 1)", "15");
+shouldBe("bar(6, false)", "10");
+shouldBe("bar(6, true)", "15");