Refactors keyboard related code so mash can use a keyboard

chrome/browser/chromeos/chrome_interface_factory.cc

+// 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.
+
+#include "chrome/browser/chromeos/chrome_interface_factory.h"
+
+#include "chrome/browser/ui/ash/keyboard_ui_service.h"
+#include "mojo/shell/public/cpp/connection.h"
+
+namespace chromeos {
+
+ChromeInterfaceFactory::ChromeInterfaceFactory() {}
+ChromeInterfaceFactory::~ChromeInterfaceFactory() {}
+
+bool ChromeInterfaceFactory::AcceptConnection(mojo::Connection* connection) {
+  connection->AddInterface(this);
+  return true;
+}
+
+void ChromeInterfaceFactory::Create(
+    mojo::Connection* connection,
+    mojo::InterfaceRequest<keyboard::mojom::Keyboard> request) {
+  if (!keyboard_ui_service_)
+    keyboard_ui_service_.reset(new KeyboardUIService);
+  keyboard_bindings_.AddBinding(keyboard_ui_service_.get(), std::move(request));
+}
+
+}  // namespace chromeos