Fix raw TemplateLiteral spans with non-ascii characters

test/mjsunit/harmony/templates.js

 // Copyright 2014 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: --harmony-templates
 
 var num = 5;
 var str = "str";
 function fn() { return "result"; }
 var obj = {
@@ skipping 383 matching lines @@
 
   callSites = [];
 
   tag`\uc548\ub155`;
   tag`안녕`;
   assertEquals(2, callSites.length);
   assertTrue(callSites[0] !== callSites[1]);
   assertEquals("안녕", callSites[0][0]);
   assertEquals("\\uc548\\ub155", callSites[0].raw[0]);
   assertEquals("안녕", callSites[1][0]);
-  // TODO(caitp, arv): blocked on correctly generating raw strings from
-  // multi-byte UTF8.
-  // assertEquals("안녕", callSites[1].raw[0]);
+  assertEquals("안녕", callSites[1].raw[0]);
+
+  // Extra-thorough UTF8 decoding test.
+  callSites = [];
+
+  tag`Iñtërnâtiônàlizætiøn\u2603\uD83D\uDCA9`;
+  tag`Iñtërnâtiônàlizætiøn☃💩`;
+
+  assertEquals(2, callSites.length);
+  assertTrue(callSites[0] !== callSites[1]);
+  assertEquals("Iñtërnâtiônàlizætiøn☃💩", callSites[0][0]);
+  assertEquals(
+      "Iñtërnâtiônàlizætiøn\\u2603\\uD83D\\uDCA9", callSites[0].raw[0]);
+  assertEquals("Iñtërnâtiônàlizætiøn☃💩", callSites[1][0]);
+  assertEquals("Iñtërnâtiônàlizætiøn☃💩", callSites[1].raw[0]);
 })();
 
 
 (function testExtendedArrayPrototype() {
   Object.defineProperty(Array.prototype, 0, {
     set: function() {
       assertUnreachable();
     }
   });
   function tag(){}
   tag`a${1}b`;
 })();