Adds extension events for custom dictionary load/change.

chrome/test/data/extensions/api_test/input_method/background.js

Index: chrome/test/data/extensions/api_test/input_method/background.js
diff --git a/chrome/test/data/extensions/api_test/input_method/background.js b/chrome/test/data/extensions/api_test/input_method/background.js
index 044779a5a784cb23f5f5e21b272a905d85ce334f..e7a8d50bae4a4e1268454f597907a1c9eed1ec9c 100644
--- a/chrome/test/data/extensions/api_test/input_method/background.js
+++ b/chrome/test/data/extensions/api_test/input_method/background.js
@@ -99,18 +99,14 @@ function getListTest() {
   });
 }
 
-function initDictionaryNotLoadedTest() {
-  // This test must come first because the dictionary is only lazy loaded after
-  // this call is made.
-  chrome.inputMethodPrivate.fetchAllDictionaryWords(function(words) {
-    chrome.test.assertTrue(words === undefined);
-    chrome.test.assertTrue(!!chrome.runtime.lastError);
-    chrome.test.succeed();
+function fetchDictionaryTests() {
+  var fetchWordsPromise = new Promise(function(resolve, reject) {
+    chrome.inputMethodPrivate.onDictionaryLoaded.addListener(function() {
+      chrome.inputMethodPrivate.fetchAllDictionaryWords(resolve);
+    });
+    chrome.inputMethodPrivate.fetchAllDictionaryWords(resolve);
   });
-}
-
-function initDictionaryTests() {
-  chrome.inputMethodPrivate.fetchAllDictionaryWords(function(words) {
+  fetchWordsPromise.then(function(words) {
     chrome.test.assertTrue(words !== undefined);
     chrome.test.assertTrue(words.length === 0);
     chrome.test.succeed();
@@ -118,17 +114,29 @@ function initDictionaryTests() {
 }
 
 function addWordToDictionaryTest() {
-  chrome.inputMethodPrivate.addWordToDictionary('helloworld', function() {
+  var wordToAdd = 'helloworld';
+  chrome.inputMethodPrivate.addWordToDictionary(wordToAdd, function() {
     chrome.inputMethodPrivate.fetchAllDictionaryWords(function(words) {
       chrome.test.assertTrue(words.length === 1);
-      chrome.test.assertEq(words[0], 'helloworld');
+      chrome.test.assertEq(words[0], wordToAdd);
       chrome.test.succeed();
     });
   });
 }
 
+function dictionaryChangedTest() {
+  var wordToAdd = 'helloworld2';
+  chrome.inputMethodPrivate.onDictionaryChanged.addListener(
+      function(added, removed) {
+        chrome.test.assertTrue(added.length === 1);
+        chrome.test.assertTrue(removed.length === 0);
+        chrome.test.assertEq(added[0], wordToAdd);
+        chrome.test.succeed();
+      });
+  chrome.inputMethodPrivate.addWordToDictionary(wordToAdd);
+}
+
 chrome.test.sendMessage('ready');
 chrome.test.runTests(
     [initTests, setTest, getTest, observeTest, setInvalidTest, getListTest,
-     initDictionaryNotLoadedTest, initDictionaryTests,
-     addWordToDictionaryTest]);
+     fetchDictionaryTests, addWordToDictionaryTest, dictionaryChangedTest]);