Declare 'this' as DYNAMIC_GLOBAL on the script_scope

test/mjsunit/global-arrow-delete-this.js

Index: test/mjsunit/global-arrow-delete-this.js
diff --git a/test/mjsunit/global-arrow-delete-this.js b/test/mjsunit/global-arrow-delete-this.js
new file mode 100644
index 0000000000000000000000000000000000000000..9ebe8e48b4c1aaf3474ff6111b68a065c71cc889
--- /dev/null
+++ b/test/mjsunit/global-arrow-delete-this.js
@@ -0,0 +1,18 @@
+// Copyright 2016 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.
+
+// Make sure that we correctly resolve this when compiling an arrow function in
+// a with scope in an arrow function.
+a = () => {
+  let x
+  with ({}) x = () => { "use strict"; delete this }
+  return x
+}
+a()()
+
+
+// Make sure that we correctly resolve this when compiling a program in an arrow
+// function.
+a = ()=>eval('"use strict"; delete this')
+a()