[EFL][WK2] Restore cursor when moving mouse into webview
https://bugs.webkit.org/show_bug.cgi?id=130182

Reviewed by Gyuyoung Kim.

We changed mouse cursor when the type of cursor is changed.
But once mouse is moved out of webview, ewebkit will not know whether cursor
is changed or not.

So, this patch added a logic to restore the last applied type of cursor when
mouse is moved into webview again.

* UIProcess/API/efl/EwkView.cpp:
(EwkViewEventHandler<EVAS_CALLBACK_MOUSE_IN>::handleEvent):
Call updateCursor to restore the last applied type of cursor.
(EwkView::EwkView):
(EwkView::updateCursor): Extracted from setCursor.
(EwkView::setCursor):
(EwkView::handleEvasObjectAdd):
* UIProcess/API/efl/EwkView.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@165730 268f45cc-cd09-0410-ab3c-d52691b4dbfc