Add the pointer type of pen to the synthetic WebMousEvent

content/browser/renderer_host/input/synthetic_gesture_target_aura.cc

Index: content/browser/renderer_host/input/synthetic_gesture_target_aura.cc
diff --git a/content/browser/renderer_host/input/synthetic_gesture_target_aura.cc b/content/browser/renderer_host/input/synthetic_gesture_target_aura.cc
index d08f69069270a214356c1b253ec036c5f1c0e857..b58482d9852955af68d9c7bd47e8f1b8299f235f 100644
--- a/content/browser/renderer_host/input/synthetic_gesture_target_aura.cc
+++ b/content/browser/renderer_host/input/synthetic_gesture_target_aura.cc
@@ -125,6 +125,16 @@ int WebEventModifiersToEventFlags(int modifiers) {
   return flags;
 }
 
+ui::EventPointerType WebMousePointerTypeToEventPointerType(
+    blink::WebPointerProperties::PointerType type) {
+  if (type == blink::WebPointerProperties::PointerType::Mouse)
+    return ui::EventPointerType::POINTER_TYPE_MOUSE;
+  if (type == blink::WebPointerProperties::PointerType::Pen)
+    return ui::EventPointerType::POINTER_TYPE_PEN;
+  NOTREACHED() << "Unexpected mouse event pointer type";
+  return ui::EventPointerType::POINTER_TYPE_UNKNOWN;
+}
+
 }  // namespace
 
 void SyntheticGestureTargetAura::DispatchWebMouseEventToPlatform(
@@ -138,6 +148,10 @@ void SyntheticGestureTargetAura::DispatchWebMouseEventToPlatform(
                        web_mouse.y * device_scale_factor_);
   mouse_event.set_location_f(location);
   mouse_event.set_root_location_f(location);
+  ui::PointerDetails pointer_details = mouse_event.pointer_details();
+  pointer_details.pointer_type =
+      WebMousePointerTypeToEventPointerType(web_mouse.pointerType);
+  mouse_event.set_pointer_details(pointer_details);
 
   aura::Window* window = GetWindow();
   mouse_event.ConvertLocationToTarget(window, window->GetRootWindow());