Extract touchscreen device management into a generic manager

ui/ozone/ozone_platform.cc

Index: ui/ozone/ozone_platform.cc
diff --git a/ui/ozone/ozone_platform.cc b/ui/ozone/ozone_platform.cc
index 12925c04ed25344d46baf5b3b8111307a2307824..c4c0822a1eaf448484352f67592f8ba93b48de20 100644
--- a/ui/ozone/ozone_platform.cc
+++ b/ui/ozone/ozone_platform.cc
@@ -5,6 +5,7 @@
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
+#include "ui/events/device_data_manager.h"
 #include "ui/ozone/ozone_platform.h"
 #include "ui/ozone/ozone_platform_list.h"
 #include "ui/ozone/ozone_switches.h"
@@ -56,6 +57,7 @@ void OzonePlatform::InitializeForUI() {
   CreateInstance();
   if (g_platform_initialized_ui)
     return;
+  DeviceDataManager::Initialize();
   g_platform_initialized_ui = true;
   instance_->InitializeUI();
 }