Import intl test suite from v8-i18n project

test/intl/general/v8Intl-exists.js

Index: test/intl/general/v8Intl-exists.js
diff --git a/src/extensions/i18n/header.js b/test/intl/general/v8Intl-exists.js
similarity index 83%
copy from src/extensions/i18n/header.js
copy to test/intl/general/v8Intl-exists.js
index 1c0a2d8874b5aa982ca2be2fb39f2ead1c4a9622..266a25d11e6c4db3748aba568d753134ea167153 100644
--- a/src/extensions/i18n/header.js
+++ b/test/intl/general/v8Intl-exists.js
@@ -26,16 +26,12 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // limitations under the License.
 
-// ECMAScript 402 API implementation is broken into separate files for
-// each service. The build system combines them together into one
-// Intl namespace.
+// Make sure that v8Intl is mapped into Intl for backward compatibility.
 
-/**
- * Intl object is a single object that has some named properties,
- * all of which are constructors.
- */
-var Intl = (function() {
+assertEquals(v8Intl, Intl);
 
-'use strict';
-
-var Intl = {};
+// Extra checks.
+assertTrue(v8Intl.hasOwnProperty('DateTimeFormat'));
+assertTrue(v8Intl.hasOwnProperty('NumberFormat'));
+assertTrue(v8Intl.hasOwnProperty('Collator'));
+assertTrue(v8Intl.hasOwnProperty('v8BreakIterator'));