Extract touchscreen device management into a generic manager

ui/events/BUILD.gn

Index: ui/events/BUILD.gn
diff --git a/ui/events/BUILD.gn b/ui/events/BUILD.gn
index 26c4b1ed633555d95df44299e3d01dacee8a4661..97122e6f9bca86496996fca5d817e053b4279cec 100644
--- a/ui/events/BUILD.gn
+++ b/ui/events/BUILD.gn
@@ -16,6 +16,8 @@ static_library("dom4_keycode_converter") {
 
 component("events_base") {
   sources = [
+    "device_data_manager.cc",
+    "device_data_manager.h",
     "event_constants.h",
     "event_switches.cc",
     "event_switches.h",
@@ -49,14 +51,16 @@ component("events_base") {
     "//ui/gfx/geometry",
   ]
 
+  forward_dependent_configs_from = [ "//ui/gfx" ]
+
   if (use_x11) {
     configs += [ "//build/config/linux:x11" ]
 
     sources += [
       "keycodes/keyboard_code_conversion_x.cc",
       "keycodes/keyboard_code_conversion_x.h",
-      "x/device_data_manager.cc",
-      "x/device_data_manager.h",
+      "x/device_data_manager_x11.cc",
+      "x/device_data_manager_x11.h",
       "x/device_list_cache_x.cc",
       "x/device_list_cache_x.h",
       "x/touch_factory_x11.cc",