chromeos: adds TouchDeviceServer and wires up in mushrome

ash/mus/touch_transform_setter_mus.cc

Index: ash/mus/touch_transform_setter_mus.cc
diff --git a/ash/mus/touch_transform_setter_mus.cc b/ash/mus/touch_transform_setter_mus.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f84ade986c9fb7fdab47a617d1ee5a4e695d5996
--- /dev/null
+++ b/ash/mus/touch_transform_setter_mus.cc
@@ -0,0 +1,35 @@
+// 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.
+
+#include "ash/mus/touch_transform_setter_mus.h"
+
+#include "services/service_manager/public/cpp/connector.h"
+#include "services/ui/public/interfaces/constants.mojom.h"
+#include "ui/display/manager/chromeos/mojo/touch_device_transform_struct_traits.h"
+#include "ui/display/manager/chromeos/touch_device_transform.h"
+
+namespace ash {
+
+TouchTransformSetterMus::TouchTransformSetterMus(
+    service_manager::Connector* connector) {
+  if (!connector)
+    return;
+
+  connector->BindInterface(ui::mojom::kServiceName, &touch_device_server_);
+}
+
+TouchTransformSetterMus::~TouchTransformSetterMus() {}
+
+void TouchTransformSetterMus::ConfigureTouchDevices(
+    const std::map<int32_t, double>& scales,
+    const std::vector<display::TouchDeviceTransform>& transforms) {
+  if (!touch_device_server_)
+    return;  // May be null in tests.
+
+  std::unordered_map<int32_t, double> scales_transport(scales.begin(),
+                                                       scales.end());
+  touch_device_server_->ConfigureTouchDevices(scales_transport, transforms);
+}
+
+}  // namespace ash