[turbofan] Fix usage of ThisFunction parameter in OSR.

test/mjsunit/compiler/osr-function-id2.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --use-osr --turbo-osr
+
+function id(f) { return f; }
+
+var x = (function foo() {
+  var sum = 0;
+  var r = id(foo);
+  for (var i = 0; i < 100000; i++) {
+    sum += i;
+  }
+  return foo == r;
+})();
+
+assertEquals(true, x);
+
+var x = (function bar() {
+  var sum = 0;
+  for (var i = 0; i < 90000; i++) {
+    sum += i;
+  }
+  return bar;
+})();
+
+assertEquals("function", typeof x);