Add support for Android spellcheck menu in Chrome/WebViews

third_party/WebKit/public/platform/input_messages.mojom

Index: third_party/WebKit/public/platform/input_messages.mojom
diff --git a/third_party/WebKit/public/platform/input_messages.mojom b/third_party/WebKit/public/platform/input_messages.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..54c3fe8510f7d42868169d0c167c072c044d089a
--- /dev/null
+++ b/third_party/WebKit/public/platform/input_messages.mojom
@@ -0,0 +1,13 @@
+// Copyright 2017 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 TextSuggestionBackend {
+  ApplySpellCheckSuggestion(string suggestion);
+  DeleteActiveSuggestionRange();
+  NewWordAddedToDictionary(string suggestion);
+  SpellCheckMenuTimeoutCallback();
+  SuggestionMenuClosed();
+};