Implement input.ime.sendKeyEvents API.

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

Index: chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js
diff --git a/chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js b/chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js
index e3ba1d6ef705d8e9be9ab6a54bcafca377c8e80e..27a422c8675ff5c3290b7f2f5af0cbdafaa92c94 100644
--- a/chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js
+++ b/chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js
@@ -52,5 +52,42 @@ chrome.test.runTests([
       win.addEventListener('unload', function() {});
       chrome.test.succeed();
     });
+  },
+
+  function testSendKeyEvent() {
+    var key_vent_count = 0;

[Devlin, 2016/03/10 23:21:14]

nit: event, not vent
nit: use js-style here (so keyEventCount).

[Azure Wei, 2016/03/11 07:29:01]

Done.

+
+    chrome.input.ime.onKeyEvent.addListener(function(engineID, keyData) {

[Devlin, 2016/03/10 23:21:14]

Hmm... it's expected behavior to receive key events for the events the extension
itself sends?  What's the use case here?

[Azure Wei, 2016/03/11 07:29:01]

Actually the extension won't handle the key events if they are sent by the
extension itself. This logic was just for keeping consistent with the logic in
ChromeOS. It's fine to not pass the event to the extension, if you feel strongly
wearied about this. Please review the updated codes.    

+      if (key_vent_count == 0) {
+        chrome.test.assertEq(keyData.type, 'keydown');
+      }
+      else if (key_vent_count == 1) {
+        chrome.test.assertEq(keyData.type, 'keyup');
+        chrome.test.succeed();
+      }
+      chrome.test.assertEq(keyData.key, 'a');
+      chrome.test.assertEq(keyData.code, 'KeyA');
+      chrome.test.assertFalse(keyData.ctrlKey);
+      chrome.test.assertFalse(keyData.altKey);
+      chrome.test.assertFalse(keyData.shiftKey);
+      chrome.test.assertFalse(keyData.capsLock);
+      ++key_vent_count;
+      return false;
+    });
+
+    chrome.input.ime.sendKeyEvents({
+      'contextID': 1,
+      'keyData': [{
+        'type': 'keydown',
+        'requestId': '0',
+        'key': 'a',
+        'code': 'KeyA'
+      }, {
+        'type': 'keyup',
+        'requestId': '1',
+        'key': 'a',
+        'code': 'KeyA'
+     }]
+    });
   }
 ]);