switch to using native JSON object

chrome/renderer/extensions/extension_api_client_unittest.cc

Index: chrome/renderer/extensions/extension_api_client_unittest.cc
diff --git a/chrome/renderer/extensions/extension_api_client_unittest.cc b/chrome/renderer/extensions/extension_api_client_unittest.cc
index 9689d952bb05554f1266881fb28b4f7406c42735..ddc7c42eaa88ca1d4aaa3684d391d41877cfaba1 100644
--- a/chrome/renderer/extensions/extension_api_client_unittest.cc
+++ b/chrome/renderer/extensions/extension_api_client_unittest.cc
@@ -71,7 +71,7 @@ TEST_F(ExtensionAPIClientTest, CallbackDispatching) {
     "}"
     "function callback(result) {"
     "  assert(typeof result == 'object', 'result not object');"
-    "  assert(goog.json.serialize(result) == '{\"foo\":\"bar\"}', "
+    "  assert(JSON.stringify(result) == '{\"foo\":\"bar\"}', "
     "         'incorrect result');"
     "  console.log('pass')"
     "}"