Separate motion event touch geometry orientation from stylus orientation.

ui/events/gestures/motion_event_aura.cc

Index: ui/events/gestures/motion_event_aura.cc
diff --git a/ui/events/gestures/motion_event_aura.cc b/ui/events/gestures/motion_event_aura.cc
index 01df3f6042620f5dd945e786f91d93affda7a1db..c6a8f717aa63d01a6c0e5d5fae1cfd10ec40b929 100644
--- a/ui/events/gestures/motion_event_aura.cc
+++ b/ui/events/gestures/motion_event_aura.cc
@@ -47,11 +47,11 @@ PointerProperties GetPointerPropertiesFromTouchEvent(const TouchEvent& touch) {
     // cases but always seem to be set to zero) unchanged.
     pointer_properties.touch_major = 2.f * radius_x;
     pointer_properties.touch_minor = 2.f * radius_y;
-    pointer_properties.orientation = rotation_angle_rad - M_PI_2;
+    pointer_properties.touch_orientation = rotation_angle_rad - M_PI_2;
   } else {
     pointer_properties.touch_major = 2.f * radius_y;
     pointer_properties.touch_minor = 2.f * radius_x;
-    pointer_properties.orientation = rotation_angle_rad;
+    pointer_properties.touch_orientation = rotation_angle_rad;
   }
 
   if (!pointer_properties.touch_major) {
@@ -59,7 +59,7 @@ PointerProperties GetPointerPropertiesFromTouchEvent(const TouchEvent& touch) {
         2.f * GestureConfiguration::GetInstance()->default_radius();
     pointer_properties.touch_minor =
         2.f * GestureConfiguration::GetInstance()->default_radius();
-    pointer_properties.orientation = 0;
+    pointer_properties.touch_orientation = 0;
   }
 
   // TODO(jdduke): Plumb tool type from the platform, crbug.com/404128.