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diff --git a/dom/inputmethod/mochitest/test_input_registry_events.html b/dom/inputmethod/mochitest/test_input_registry_events.html
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index 0000000000..e2c3c1f9d7
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@@ -0,0 +1,251 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1201407
+-->
+<head>
+  <title>Test addinputrequest and removeinputrequest event</title>
+  <script type="application/javascript;version=1.7" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript;version=1.7" src="inputmethod_common.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1201407">Mozilla Bug 1201407</a>
+<p id="display"></p>
+<pre id="test">
+<script class="testbody" type="application/javascript;version=1.7">
+
+let appFrameMM;
+let nextStep;
+
+function setupInputAppFrame() {
+  info('setupInputAppFrame');
+  return new Promise((resolve, reject) => {
+    let appFrameScript = function appFrameScript() {
+      let im = content.navigator.mozInputMethod;
+
+      addMessageListener('test:callAddInput', function() {
+        im.addInput('foo', {
+            launch_path: 'bar.html',
+            name: 'Foo',
+            description: 'foobar',
+            types: ['text', 'password']
+          })
+          .then((r) => {
+              sendAsyncMessage('test:resolved', { resolved: true, result: r });
+            }, (e) => {
+              sendAsyncMessage('test:rejected', { rejected: true, error: e });
+            });
+      });
+
+      addMessageListener('test:callRemoveInput', function() {
+        im.removeInput('foo')
+          .then((r) => {
+              sendAsyncMessage('test:resolved', { resolved: true, result: r });
+            }, (e) => {
+              sendAsyncMessage('test:rejected', { rejected: true, error: e });
+            });
+      });
+
+      im.mgmt.onaddinputrequest =
+      im.mgmt.onremoveinputrequest = function(evt) {
+        sendAsyncMessage('test:appEvent', { type: evt.type });
+      };
+
+      content.document.body.textContent = 'I am a input app';
+    };
+
+    let path = location.pathname;
+    let basePath = location.protocol + '//' + location.host +
+                 path.substring(0, path.lastIndexOf('/'));
+    let imeUrl = basePath + '/file_blank.html';
+
+    let inputAppFrame = document.createElement('iframe');
+    inputAppFrame.setAttribute('mozbrowser', true);
+    // FIXME: Bug 1270790
+    inputAppFrame.setAttribute('remote', true);
+    inputAppFrame.src = imeUrl;
+    document.body.appendChild(inputAppFrame);
+
+    let mm = appFrameMM =
+      SpecialPowers.getBrowserFrameMessageManager(inputAppFrame);
+
+    inputAppFrame.addEventListener('mozbrowserloadend', function() {
+      mm.addMessageListener('test:appEvent', function(msg) {
+        ok(false, 'Input app should not receive ' + msg.data.type + ' event.');
+      });
+      mm.addMessageListener('test:resolved', function(msg) {
+        nextStep && nextStep(msg.data);
+      });
+      mm.addMessageListener('test:rejected', function(msg) {
+        nextStep && nextStep(msg.data);
+      });
+      mm.loadFrameScript('data:,(' + encodeURIComponent(appFrameScript.toString()) + ')();', false);
+
+      resolve();
+    });
+  });
+}
+
+function Deferred() {
+  this.promise = new Promise((res, rej) => {
+    this.resolve = res;
+    this.reject = rej;
+  });
+  return this;
+}
+
+function deepAssertObject(obj, expectedObj, desc) {
+  for (let prop in expectedObj) {
+    if (typeof expectedObj[prop] === 'object') {
+      deepAssertObject(obj[prop], expectedObj[prop], desc + '.' + prop);
+    } else {
+      is(obj[prop], expectedObj[prop], desc + '.' + prop);
+    }
+  }
+}
+
+function setupTestRunner() {
+  let im = navigator.mozInputMethod;
+  let d;
+
+  let i = -1;
+  nextStep = function next(evt) {
+    i++;
+    info('Step ' + i);
+
+    switch (i) {
+      case 0:
+        appFrameMM.sendAsyncMessage('test:callAddInput');
+
+        break;
+
+      case 1:
+        is(evt.type, 'addinputrequest', 'evt.type');
+        deepAssertObject(evt.detail, {
+          inputId: 'foo',
+          manifestURL: null, // todo
+          inputManifest: {
+            launch_path: 'bar.html',
+            name: 'Foo',
+            description: 'foobar',
+            types: ['text', 'password']
+          }
+        }, 'detail');
+
+        d = new Deferred();
+        evt.detail.waitUntil(d.promise);
+        evt.preventDefault();
+
+        Promise.resolve().then(next);
+        break;
+
+      case 2:
+        d.resolve();
+        d = null;
+        break;
+
+      case 3:
+        ok(evt.resolved, 'resolved');
+        appFrameMM.sendAsyncMessage('test:callAddInput');
+
+        break;
+
+      case 4:
+        is(evt.type, 'addinputrequest', 'evt.type');
+
+        d = new Deferred();
+        evt.detail.waitUntil(d.promise);
+        evt.preventDefault();
+
+        Promise.resolve().then(next);
+        break;
+
+      case 5:
+        d.reject('Foo Error');
+        d = null;
+        break;
+
+      case 6:
+        ok(evt.rejected, 'rejected');
+        is(evt.error, 'Foo Error', 'rejected');
+
+
+        appFrameMM.sendAsyncMessage('test:callRemoveInput');
+
+        break;
+
+      case 7:
+        is(evt.type, 'removeinputrequest', 'evt.type');
+        deepAssertObject(evt.detail, {
+          inputId: 'foo',
+          manifestURL: null // todo
+        }, 'detail');
+
+        d = new Deferred();
+        evt.detail.waitUntil(d.promise);
+        evt.preventDefault();
+
+        Promise.resolve().then(next);
+        break;
+
+      case 8:
+        d.resolve();
+        d = null;
+        break;
+
+      case 9:
+        ok(evt.resolved, 'resolved');
+        appFrameMM.sendAsyncMessage('test:callRemoveInput');
+
+        break;
+
+      case 10:
+        is(evt.type, 'removeinputrequest', 'evt.type');
+
+        d = new Deferred();
+        evt.detail.waitUntil(d.promise);
+        evt.preventDefault();
+
+        Promise.resolve().then(next);
+        break;
+
+      case 11:
+        d.reject('Foo Error');
+        d = null;
+        break;
+
+      case 12:
+        ok(evt.rejected, 'rejected');
+        is(evt.error, 'Foo Error', 'rejected');
+        inputmethod_cleanup();
+
+        break;
+
+      default:
+        ok(false, 'received extra call.');
+        inputmethod_cleanup();
+
+        break;
+    }
+  }
+
+  im.mgmt.onaddinputrequest =
+  im.mgmt.onremoveinputrequest = nextStep;
+}
+
+inputmethod_setup(function() {
+  Promise.resolve()
+    .then(() => setupTestRunner())
+    .then(() => setupInputAppFrame())
+    .then(() => nextStep())
+    .catch((e) => {
+      ok(false, 'Error' + e.toString());
+      console.error(e);
+    });
+});
+
+</script>
+</pre>
+</body>
+</html>