Add mojo interface to load hyphenation dictionaries on Android

third_party/WebKit/public/platform/modules/hyphenation/hyphenation.mojom

 // 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.
 
 module blink.mojom;
 
-interface MimeRegistry {
+// Loads hyphenation dictionary.
+interface Hyphenation {
+  // Returns a handle to the raw hyphneation dictionary.
   [Sync]
-  GetMimeTypeFromExtension(string extension) => (string mime_type);
+  OpenDictionary(string locale) => (handle? hyphenation_dictionary_handle);
 };