chromeos: moves setting of touch state to a separate class

ui/display/manager/chromeos/default_touch_transform_setter.h

+// 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.
+
+#ifndef UI_DISPLAY_MANAGER_CHROMEOS_DEFAULT_TOUCH_TRANSFORM_SETTER_H_
+#define UI_DISPLAY_MANAGER_CHROMEOS_DEFAULT_TOUCH_TRANSFORM_SETTER_H_
+
+#include "base/macros.h"
+#include "ui/display/manager/chromeos/touch_transform_setter.h"
+
+namespace display {
+
+class DISPLAY_MANAGER_EXPORT DefaultTouchTransformSetter
+    : public TouchTransformSetter {
+ public:
+  DefaultTouchTransformSetter();
+  ~DefaultTouchTransformSetter() override;
+
+  // TouchTransformSetter:
+  void ConfigureTouchDevices(
+      const std::map<int32_t, double>& scales,
+      const std::vector<TouchDeviceTransform>& transforms) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DefaultTouchTransformSetter);
+};
+
+}  // namespace display
+
+#endif  // UI_DISPLAY_MANAGER_CHROMEOS_DEFAULT_TOUCH_TRANSFORM_SETTER_H_