Add full touch support to mus.

services/ui/display/screen_manager_ozone.cc

Index: services/ui/display/screen_manager_ozone.cc
diff --git a/services/ui/display/screen_manager_ozone.cc b/services/ui/display/screen_manager_ozone.cc
index e48d6a1e78243bc3b6d3025a0ad727da5aacf7d0..9a8a0412b5ed77e4f2398df55d545abae2bcf714 100644
--- a/services/ui/display/screen_manager_ozone.cc
+++ b/services/ui/display/screen_manager_ozone.cc
@@ -14,6 +14,7 @@
 #include "services/service_manager/public/cpp/interface_registry.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/display/manager/chromeos/display_change_observer.h"
+#include "ui/display/manager/chromeos/touch_transform_controller.h"
 #include "ui/display/manager/display_layout_store.h"
 #include "ui/display/manager/display_manager_utilities.h"
 #include "ui/display/screen.h"
@@ -63,6 +64,8 @@ ScreenManagerOzone::~ScreenManagerOzone() {
   // We are shutting down and don't want to make anymore display changes.
   fake_display_controller_ = nullptr;
 
+  touch_transform_controller_.reset();
+
   if (display_manager_)
     display_manager_->RemoveObserver(this);
 
@@ -180,6 +183,9 @@ void ScreenManagerOzone::Init(ScreenManagerDelegate* delegate) {
   // Perform initial configuration.
   display_configurator_.Init(std::move(native_display_delegate_), false);
   display_configurator_.ForceInitialConfigure(kChromeOsBootColor);
+
+  touch_transform_controller_ = base::MakeUnique<TouchTransformController>(
+      &display_configurator_, display_manager_.get());
 }
 
 void ScreenManagerOzone::RequestCloseDisplay(int64_t display_id) {
@@ -356,6 +362,8 @@ void ScreenManagerOzone::PostDisplayConfigurationChange(
     }
   }
 
+  touch_transform_controller_->UpdateTouchTransforms();
+
   DVLOG(1) << "PostDisplayConfigurationChange";
 }