Re-land "Issue 191223007: Move touch CTM from X into Chrome"

ui/events/x/events_x.cc

Index: ui/events/x/events_x.cc
diff --git a/ui/events/x/events_x.cc b/ui/events/x/events_x.cc
index b03af6b484ad35fe66644d6e87a97f993c6161a4..32b4b7ee311159fb877b37f1b0ad45016e9cfe8e 100644
--- a/ui/events/x/events_x.cc
+++ b/ui/events/x/events_x.cc
@@ -461,8 +461,21 @@ gfx::Point EventLocationFromNative(const base::NativeEvent& native_event) {
     case GenericEvent: {
       XIDeviceEvent* xievent =
           static_cast<XIDeviceEvent*>(native_event->xcookie.data);
-      return gfx::Point(static_cast<int>(xievent->event_x),
-                        static_cast<int>(xievent->event_y));
+      float x = xievent->event_x;
+      float y = xievent->event_y;
+#if defined(OS_CHROMEOS)
+      switch (xievent->evtype) {
+        case XI_TouchBegin:
+        case XI_TouchUpdate:
+        case XI_TouchEnd:
+          ui::DeviceDataManager::GetInstance()->ApplyTouchTransformer(
+              xievent->deviceid, &x, &y);
+          break;
+        default:
+          break;
+      }
+#endif  // defined(OS_CHROMEOS)
+      return gfx::Point(static_cast<int>(x), static_cast<int>(y));
     }
   }
   return gfx::Point();