Send mouse exited event after mouse release outside view.

ui/views/widget/root_view.cc

Index: ui/views/widget/root_view.cc
diff --git a/ui/views/widget/root_view.cc b/ui/views/widget/root_view.cc
index cbfb8c4a95dffa42d8ffa0e11797a44fcfd765f0..fa931d524c1017818a9c7cea6c9e8419f6e1f77e 100644
--- a/ui/views/widget/root_view.cc
+++ b/ui/views/widget/root_view.cc
@@ -52,6 +52,16 @@ class MouseEnterExitEvent : public ui::MouseEvent {
   ~MouseEnterExitEvent() override {}
 };
 
+class GeneratedMouseMoveEvent : public ui::MouseEvent {
+ public:
+  GeneratedMouseMoveEvent(const ui::MouseEvent& event)
+      : ui::MouseEvent(event) {
+    SetType(ui::ET_MOUSE_MOVED);
+  }
+
+  ~GeneratedMouseMoveEvent() override {}
+};
+
 }  // namespace
 
 // This event handler receives events in the pre-target phase and takes care of
@@ -447,6 +457,9 @@ void RootView::OnMouseReleased(const ui::MouseEvent& event) {
         DispatchEvent(mouse_pressed_handler, &mouse_released);
     if (dispatch_details.dispatcher_destroyed)
       return;
+    // We should send generated mouse event, to update hovers after releasing of
+    // mouse capturing.
+    OnMouseMoved(GeneratedMouseMoveEvent(event));

[sadrul, 2016/10/28 16:07:39]

Always sending a mouse-move after a mouse-release doesn't sound like a good idea
to me.

[snake, 2016/10/28 16:21:38]

But we should do this, because View under cursor (which may not
mouse_pressed_handler), don't know that mouse was moved on it before. This is
just post notification about this.

Should I write test on this case?
  The test will be:
   MouseDown on first view.
   Move mouse to second view
   Release mouse on second view.
   Second view should receive mouse exited and mouse moved notifications.

   }
 }