Expose sky KeyboardService in android mojo_shell

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

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// 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.
 
-module mojo;
+module keyboard;
 
-interface Keyboard {
-  Show();
+struct CompletionData {
+  int64 id;
+  int32 position;
+  string text;
+  string label;
+};
+
+struct CorrectionData {
+  int32 offset;
+  string old_text;
+  string new_text;
+};
+
+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);
+};
+
+interface KeyboardService {
+  Show(KeyboardClient client);
   Hide();
 };