Migrated several tests from blink to V8 repository.

test/webkit/dfg-inline-unused-this.js

Index: test/webkit/dfg-inline-unused-this.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-inline-unused-this.js
similarity index 66%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-inline-unused-this.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..5983d724443d6daceef5780123f8eecf1cd2cdaf 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-inline-unused-this.js
@@ -22,10 +22,36 @@
 // 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 inlining a function that does not use this does not result in this being lost entirely."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(a, b) {
+    return a + b;
+}
 
+function bar(a, b) {
+    return this.f + a + b;
+}
+
+function baz(o, a, b) {
+    return o.stuff(a, b);
+}
+
+var functionToCall = foo;
+var offset = 0;
+for (var i = 0; i < 1000; ++i) {
+    if (i == 600) {
+        functionToCall = bar;
+        offset = 42;
+    }
+
+    // Create some bizzare object to prevent method_check optimizations, since those will result in
+    // a failure while the function is still live.
+    var object = {};
+    object["a" + i] = i;
+    object.stuff = functionToCall;
+    object.f = 42;
+
+    shouldBe("baz(object, " + i + ", " + (i * 2) + ")", "" + (offset + i + i * 2));
+}