Allow component IME extension use app.window and add 'ime' window type for app window

extensions/common/api/_permission_features.json

 // Copyright 2014 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.
 
 // This features file defines permissions for extension APIs implemented
 // under src/extensions.
 
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
@@ skipping 89 matching lines @@
         "02037314DA4D913640DCF0E296A7D01F4FD793EC",
         "B6EC0809BC63E10B431C5E4AA3645232CA86B2A5",
         "48CA541313139786F056DBCB504A1025CFF5D2E3",
         "05106136AE7F08A3C181D4648E5438350B1D2B4F",
         "A07A5B743CD82A1C2579DB77D353C98A23201EEF",  // http://crbug.com/413748
         "F16F23C83C5F6DAD9B65A120448B34056DD80691",
         "0F585FB1D0FDFBEBCE1FEB5E9DFFB6DA476B8C9B"
       ]
     }
   ],
+  "app.window.ime": [
+    {
+       "channel": "stable",
+       "extension_types": ["extension"],
+       "platforms": ["chromeos"],
+       "whitelist": [
+         "06BE211D5F014BAB34BC22D9DDA09C63A81D828E",
+         "F94EE6AB36D6C6588670B2B01EB65212D9C64E33"
+       ]
+    }
+  ],
   "audioCapture": [
     {
       "channel": "stable",
       "extension_types": ["platform_app"]
     },
     {
       "channel": "stable",
       "extension_types": ["extension"],
       "whitelist": [
         // http://crbug.com/292856
@@ skipping 207 matching lines @@
       // addressed. Tracked in crbug/285151.
       "channel": "stable",
       "extension_types": ["extension"],
       "location": "component",
       "whitelist": [
         "D519188F86D9ACCEE0412007B227D9936EB9676B"  // GAIA Component Extension
       ]
     }
   ]
 }