Implementing chrome.i18n.getMessage call, that loads message from the extensi...

chrome/test/data/extensions/api_test/i18n/test.js

 // i18n api test
-// browser_tests.exe --gtest_filter=ExtensionApiTest.I18N
+// browser_tests.exe --gtest_filter=ExtensionApiTest.I18N --lib=browser_tests
 
 var testCallback = chrome.test.testCallback;
 
 chrome.test.runTests([
   function getAcceptLanguages() {
     chrome.i18n.getAcceptLanguages(chrome.test.callbackPass(function(results) {
       chrome.test.assertEq(results.length, 2);
       chrome.test.assertEq(results[0], "en-US");
       chrome.test.assertEq(results[1], "en");
     }));
-  }
+  },
+  function getMessage() {
+    var message = chrome.i18n.getMessage("simple_message");
+    chrome.test.assertEq(message, "Simple message");
+
+    message = chrome.i18n.getMessage("message_with_placeholders",
+                                     ["Cira", "John"]);
+    chrome.test.assertEq(message, "Cira and John work for Google");
+
+    message = chrome.i18n.getMessage("message_with_one_placeholder", "19");
+    chrome.test.assertEq(message, "Number of errors: 19");
+
+    chrome.test.succeed();
+  },
 ]);