Add chrome.inputMethodPrivate.onImeMenuActivationChanged API.

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 ccfc67e14f687515b88846cbc9acbf1c35a67abe..2a04b82758796ad53c1f81d423806cecd1da46fd 100644
--- a/chrome/test/data/extensions/api_test/input_method/background.js
+++ b/chrome/test/data/extensions/api_test/input_method/background.js
@@ -192,8 +192,15 @@ function dictionaryChangedTest() {
       });
 }
 
+function imeMenuConfigTest() {
+  chrome.inputMethodPrivate.getInputMethodConfig(function(config) {
+    chrome.test.assertTrue(config["isImeMenuActivated"]);
+    chrome.test.succeed();
+  });

[stevenjb, 2016/01/20 18:33:43]

This tests the initial state, but not the event. See e.g.
dictionaryChangedTest() above.

[Azure Wei, 2016/01/21 10:25:07]

imeMenuActivationChangedTest() is added to test the state change event.

+}
+
 chrome.test.sendMessage('ready');
 chrome.test.runTests(
     [initTests, setTest, getTest, observeTest, setInvalidTest, getListTest,
      loadDictionaryAsyncTest, fetchDictionaryTest, addWordToDictionaryTest,
-     dictionaryChangedTest]);
+     ictionaryChangedTest, imeMenuConfigTest]);

[stevenjb, 2016/01/20 18:33:43]

'd' missing at beginning of line. (Did this succeed locally?)

[Azure Wei, 2016/01/21 10:25:07]

Sorry about the mistake.