Do not convert mouse move events to mouse leave or enter events in blink

third_party/WebKit/Source/web/WebInputEventConversion.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 116 matching lines @@
 
   return web_mouse_button_to_platform_modifier[static_cast<int>(button)];
 }
 
 }  // namespace
 
 WebMouseEvent TransformWebMouseEvent(FrameView* frame_view,
                                      const WebMouseEvent& event) {
   WebMouseEvent result = event;
 
-  // TODO(dtapuska): Remove this translation. In the past blink has
-  // converted leaves into moves and not known about leaves. It should
-  // be educated about them. crbug.com/686196
-  if (event.GetType() == WebInputEvent::kMouseEnter ||
-      event.GetType() == WebInputEvent::kMouseLeave) {
-    result.SetType(WebInputEvent::kMouseMove);
-  }
-
   // TODO(dtapuska): Perhaps the event should be constructed correctly?
   // crbug.com/686200
   if (event.GetType() == WebInputEvent::kMouseUp) {
     result.SetModifiers(event.GetModifiers() &
                         ~ToWebInputEventModifierFrom(event.button));
   }
   result.SetFrameScale(FrameScale(frame_view));
   result.SetFrameTranslate(FrameTranslation(frame_view));
   return result;
 }
@@ skipping 225 matching lines @@
   Vector<WebTouchEvent> result;
   for (const auto& event : coalesced_events) {
     DCHECK(WebInputEvent::IsTouchEventType(event->GetType()));
     result.push_back(TransformWebTouchEvent(
         scale, translation, static_cast<const WebTouchEvent&>(*event)));
   }
   return result;
 }
 
 }  // namespace blink