chromeos: adds TouchDeviceServer and wires up in mushrome

ui/display/manager/chromeos/mojo/touch_device_transform.mojom

Index: ui/display/manager/chromeos/mojo/touch_device_transform.mojom
diff --git a/ui/display/manager/chromeos/mojo/touch_device_transform.mojom b/ui/display/manager/chromeos/mojo/touch_device_transform.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..3daa99133375c7ca750f8b77c73126bb13e4f937
--- /dev/null
+++ b/ui/display/manager/chromeos/mojo/touch_device_transform.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 display.mojom;
+
+import "ui/gfx/mojo/transform.mojom";
+
+struct TouchDeviceTransform {
+  int64 display_id;
+  int32 device_id;
+  gfx.mojom.Transform transform;
+};