chromeos: adds TouchDeviceServer and wires up in mushrome

services/ui/public/interfaces/input_devices/touch_device_server.mojom

Index: services/ui/public/interfaces/input_devices/touch_device_server.mojom
diff --git a/services/ui/public/interfaces/input_devices/touch_device_server.mojom b/services/ui/public/interfaces/input_devices/touch_device_server.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..9b5979190c440f310f98b17779fbe3897a51bbdf
--- /dev/null
+++ b/services/ui/public/interfaces/input_devices/touch_device_server.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 ui.mojom;
+
+import "ui/display/manager/chromeos/mojo/touch_device_transform.mojom";
+
+interface TouchDeviceServer {
+  // Reset the touch configuration. |scales| maps from touch_id to the scale.
+  ConfigureTouchDevices(map<int32, double> scales,
+                        array<display.mojom.TouchDeviceTransform> transforms);
+};