[EFL][WK2] Implement context menu in MiniBrowser
https://bugs.webkit.org/show_bug.cgi?id=102932

Patch by Michał Pakuła vel Rutka <m.pakula@samsung.com> on 2013-04-17
Reviewed by Gyuyoung Kim.

Added context menu support for EFL port using Elementary context popup.

* MiniBrowser/efl/main.c:
(_Browser_Window):
(context_popup_item_selected_cb):
(context_popup_populate):
(on_context_menu_show):
(on_context_menu_hide):
(window_create):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148609 268f45cc-cd09-0410-ab3c-d52691b4dbfc