Remove ununsed ContextMenuType parameter of various methods.

Remove ununsed ContextMenuType parameter of various methods.

WebContentsViewDelegateEwk::ShowContextMenu calls
EWebView::ShowContextMenu which calls ContextMenuController
ctor. ContextMenuType is passed as a parameter through
them, but is not used.

Patch removes it.

Origin beta/m42 patch:
- http://165.213.202.130/gerrit/#/c/86027/ , reviewed by
Laszlo Gombos, Arnaud Renevier.

Bug: http://107.108.218.239/bugzilla/show_bug.cgi?id=14304

Reviewed by: Janusz Majnert

Change-Id: Idfff4e1fd961e8cfc68a478a20bbb23fed4c0c18
Signed-off-by: Antonio Gomes <a1.gomes@samsung.com>