[WIP] Add support for Android SuggestionSpans when editing text

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..6b2e18d30315eba0ab19890394d510288ca0035e
--- /dev/null
+++ b/third_party/WebKit/public/platform/input_messages.mojom
@@ -0,0 +1,11 @@
+// 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 {
+  ApplySuggestionReplacement(int64 document_marker_hash, int32 suggestion_index);
+  DeleteSuggestionHighlight();
+  SuggestionMenuClosed();
+};