chromeos: adds TouchDeviceServer and wires up in mushrome

ash/aura/shell_port_classic.cc

Index: ash/aura/shell_port_classic.cc
diff --git a/ash/aura/shell_port_classic.cc b/ash/aura/shell_port_classic.cc
index 0c8a8fc3930fb63c77b597c6e818d1718542818b..794ba2054904db9bf0a15409c64130d25482ef2a 100644
--- a/ash/aura/shell_port_classic.cc
+++ b/ash/aura/shell_port_classic.cc
@@ -37,6 +37,7 @@
 #include "ash/wm_window.h"
 #include "base/memory/ptr_util.h"
 #include "ui/aura/env.h"
+#include "ui/display/manager/chromeos/default_touch_transform_setter.h"
 #include "ui/display/manager/display_manager.h"
 #include "ui/display/types/native_display_delegate.h"
 
@@ -118,6 +119,11 @@ void ShellPortClassic::SetDisplayWorkAreaInsets(WmWindow* window,
       ->UpdateWorkAreaOfDisplayNearestWindow(window->aura_window(), insets);
 }
 
+std::unique_ptr<display::TouchTransformSetter>
+ShellPortClassic::CreateTouchTransformDelegate() {
+  return base::MakeUnique<display::DefaultTouchTransformSetter>();
+}
+
 void ShellPortClassic::LockCursor() {
   Shell::Get()->cursor_manager()->LockCursor();
 }