Update ui::PointerEvent to support mouse wheel and capture change events.

ui/events/event.cc

Index: ui/events/event.cc
diff --git a/ui/events/event.cc b/ui/events/event.cc
index eff99926a21b3d44e1d31a6f1d1e30d897f6e899..a83aff76bb064dfd97c2cc94e706c7e4236776da 100644
--- a/ui/events/event.cc
+++ b/ui/events/event.cc
@@ -104,6 +104,8 @@ std::string EventTypeName(ui::EventType type) {
     CASE_TYPE(ET_POINTER_CANCELLED);
     CASE_TYPE(ET_POINTER_ENTERED);
     CASE_TYPE(ET_POINTER_EXITED);
+    CASE_TYPE(ET_POINTER_WHEEL_CHANGED);
+    CASE_TYPE(ET_POINTER_CAPTURE_CHANGED);
     CASE_TYPE(ET_GESTURE_SCROLL_BEGIN);
     CASE_TYPE(ET_GESTURE_SCROLL_END);
     CASE_TYPE(ET_GESTURE_SCROLL_UPDATE);
@@ -496,6 +498,14 @@ MouseEvent::MouseEvent(const PointerEvent& pointer_event)
       SetType(ET_MOUSE_RELEASED);
       break;
 
+    case ET_POINTER_WHEEL_CHANGED:
+      SetType(ET_MOUSEWHEEL);
+      break;
+
+    case ET_POINTER_CAPTURE_CHANGED:
+      SetType(ET_MOUSE_CAPTURE_CHANGED);
+      break;
+
     default:
       NOTREACHED();
   }
@@ -847,6 +857,8 @@ bool PointerEvent::CanConvertFrom(const Event& event) {
     case ET_MOUSE_ENTERED:
     case ET_MOUSE_EXITED:
     case ET_MOUSE_RELEASED:
+    case ET_MOUSEWHEEL:
+    case ET_MOUSE_CAPTURE_CHANGED:
     case ET_TOUCH_PRESSED:
     case ET_TOUCH_MOVED:
     case ET_TOUCH_RELEASED:
@@ -889,6 +901,16 @@ PointerEvent::PointerEvent(const MouseEvent& mouse_event)
       SetType(ET_POINTER_UP);
       break;
 
+    case ET_MOUSEWHEEL:
+      SetType(ET_POINTER_WHEEL_CHANGED);
+      details_ = PointerDetails(EventPointerType::POINTER_TYPE_MOUSE,
+                                mouse_event.AsMouseWheelEvent()->offset());
+      break;
+
+    case ET_MOUSE_CAPTURE_CHANGED:
+      SetType(ET_POINTER_CAPTURE_CHANGED);
+      break;
+
     default:
       NOTREACHED();
   }