Remove input methods when removing languages

chrome/test/data/webui/settings/fake_language_settings_private.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Fake implementation of chrome.languageSettingsPrivate
  * for testing.
  */
 cr.define('settings', function() {
   /**
@@ skipping 67 matching lines @@
     this.componentExtensionImes = [{
       id: '_comp_ime_fgoepimhcoialccpbmpnnblemnepkkaoxkb:us::eng',
       displayName: 'US keyboard',
       languageCodes: ['en', 'en-US'],
       enabled: true,
     }, {
       id: '_comp_ime_fgoepimhcoialccpbmpnnblemnepkkaoxkb:us:dvorak:eng',
       displayName: 'US Dvorak keyboard',
       languageCodes: ['en', 'en-US'],
       enabled: true,
+    }, {
+      id: '_comp_ime_abcdefghijklmnopqrstuvwxyzabcdefxkb:sw:sw',
+      displayName: 'Swahili keyboard',
+      languageCodes: ['sw', 'tk'],
+      enabled: false,
+    }, {
+      id: '_comp_ime_abcdefghijklmnopqrstuvwxyzabcdefxkb:us:sw',
+      displayName: 'US Swahili keyboard',
+      languageCodes: ['en', 'en-US', 'sw'],
+      enabled: false,
     }];
   }
 
   FakeLanguageSettingsPrivate.prototype = {
     // Methods for use in testing.
 
     /** @param {SettingsPrefsElement} */
     setSettingsPrefs: function(settingsPrefs) {
       this.settingsPrefs_ = settingsPrefs;
     },
@@ skipping 74 matching lines @@
             JSON.parse(JSON.stringify(this.componentExtensionImes)),
         thirdPartyExtensionImes: [],
       });
     },
 
     /**
      * Adds the input method to the current user's list of enabled input
      * methods, enabling the input method for the current user. Chrome OS only.
      * @param {string} inputMethodId
      */
-    addInputMethod: wrapAssertNotReached('addInputMethod'),
+    addInputMethod: function(inputMethodId) {
+      assert(cr.isChromeOS);
+      var inputMethod = this.componentExtensionImes.find(function(ime) {
+        return ime.id == inputMethodId;
+      });
+      assertTrue(!!inputMethod);
+      inputMethod.enabled = true;
+      var prefPath = 'prefs.settings.language.preload_engines.value';
+      var enabledInputMethods = this.settingsPrefs_.get(prefPath).split(',');
+      enabledInputMethods.push(inputMethodId);
+      this.settingsPrefs_.set(prefPath, enabledInputMethods.join(','))
+    },
 
     /**
      * Removes the input method from the current user's list of enabled input
      * methods, disabling the input method for the current user. Chrome OS only.
      * @param {string} inputMethodId
      */
     removeInputMethod: function(inputMethodId) {
       assert(cr.isChromeOS);
       var inputMethod = this.componentExtensionImes.find(function(ime) {
         return ime.id == inputMethodId;
@@ skipping 28 matching lines @@
 
     /**
      * Called when an input method is removed.
      * @type {!ChromeEvent}
      */
     onInputMethodRemoved: new FakeChromeEvent(),
   };
 
   return {FakeLanguageSettingsPrivate: FakeLanguageSettingsPrivate};
 });