Add a Submit method to the keyboard interface

mojo/services/keyboard/public/interfaces/keyboard.mojom

 // Copyright 2015 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.
 
 [DartPackage="mojo_services"]
 module keyboard;
 
 struct CompletionData {
   int64 id;
   int32 position;
   string text;
   string label;
 };
 
 struct CorrectionData {
   int32 offset;
   string old_text;
   string new_text;
 };
 
+enum SubmitAction {
+  DONE,
+};
+
 interface KeyboardClient {
   CommitCompletion(CompletionData completion);
   CommitCorrection(CorrectionData correction);
   CommitText(string text, int32 newCursorPosition);
   DeleteSurroundingText(int32 beforeLength, int32 afterLength);
   SetComposingRegion(int32 start, int32 end);
   SetComposingText(string text, int32 newCursorPosition);
   SetSelection(int32 start, int32 end);
+  Submit(SubmitAction action);
 };
 
 // Loosely modeled on Android InputType:
 // http://developer.android.com/reference/android/text/InputType.html
 enum KeyboardType {
   TEXT,
   NUMBER,
   PHONE,
   DATETIME,
 };
 
 interface KeyboardService {
   Show(KeyboardClient client, KeyboardType type);
   ShowByRequest();
   Hide();
+  SetText(string text);
+  SetSelection(int32 start, int32 end);
 };