[EFL][WK2] Support Context Menu

[EFL][WK2] Support Context Menu
https://bugs.webkit.org/show_bug.cgi?id=96200

Reviewed by Laszlo Gombos.

Source/WebCore:

* page/ContextMenuController.cpp:
(WebCore::ContextMenuController::populate):
EFL port also doesn't hide unavailable menus as gtk port.

Source/WebKit2:

This patch supports WK2 EFL's context menu as WK1 implementation because we can't use elementary in inside WebKit.
Only basic functionalities of context menu are supported. Beside this implementation follows GTK's implementation.
For example, ewk_context_menu_new, ewk_context_menu_item_append, ewk_context_menu_item_remove are supported.

In addition, ewk_defines.h file is added in order to support cross inclusion as GTK port.

* PlatformEfl.cmake:
* UIProcess/API/efl/EWebKit2.h:
* UIProcess/API/efl/EwkViewImpl.cpp:
(EwkViewImpl::EwkViewImpl):
(EwkViewImpl::showContextMenu):
(EwkViewImpl::hideContextMenu):
* UIProcess/API/efl/EwkViewImpl.h:
(WebKit):
(EwkViewImpl):
* UIProcess/API/efl/ewk_context_menu.cpp: Added.
(EwkContextMenu::EwkContextMenu):
(EwkContextMenu::~EwkContextMenu):
(EwkContextMenu::hide):
(Ewk_Context_Menu::appendItem):
(Ewk_Context_Menu::removeItem):
(EwkContextMenu::contextMenuItemSelected):
(ewk_context_menu_new):
(ewk_context_menu_new_with_items):
(ewk_context_menu_item_append):
(ewk_context_menu_item_remove):
(ewk_context_menu_hide):
(ewk_context_menu_items_get):
(ewk_context_menu_item_select):
* UIProcess/API/efl/ewk_context_menu.h: Added.
* UIProcess/API/efl/ewk_context_menu_item.cpp: Added.
(EwkContextMenuItem::EwkContextMenuItem):
(ewk_context_menu_item_new):
(ewk_context_menu_item_new_with_submenu):
(ewk_context_menu_item_type_get):
(ewk_context_menu_item_type_set):
(ewk_context_menu_item_action_get):
(ewk_context_menu_item_action_set):
(ewk_context_menu_item_title_get):
(ewk_context_menu_item_title_set):
(ewk_context_menu_item_checked_get):
(ewk_context_menu_item_checked_set):
(ewk_context_menu_item_enabled_get):
(ewk_context_menu_item_enabled_set):
* UIProcess/API/efl/ewk_context_menu_item.h: Added.
* UIProcess/API/efl/ewk_context_menu_item_private.h: Added.
(EwkContextMenuItem):
(EwkContextMenuItem::create):
(EwkContextMenuItem::action):
(EwkContextMenuItem::setAction):
(EwkContextMenuItem::title):
(EwkContextMenuItem::setTitle):
(EwkContextMenuItem::type):
(EwkContextMenuItem::setType):
(EwkContextMenuItem::checked):
(EwkContextMenuItem::setChecked):
(EwkContextMenuItem::enabled):
(EwkContextMenuItem::setEnabled):
* UIProcess/API/efl/ewk_context_menu_private.h: Added.
(WebKit):
(EwkContextMenu):
(EwkContextMenu::create):
(EwkContextMenu::items):
* UIProcess/API/efl/ewk_defines.h: Added.
* UIProcess/API/efl/ewk_view.h:
* UIProcess/API/efl/tests/test_ewk2_context_menu.cpp: Added.
(checkBasicContextMenuItem):
(showContextMenu):
(TEST_F):
* UIProcess/efl/ContextMenuClientEfl.cpp: Added.
(toContextClientEfl):
(ContextMenuClientEfl::ContextMenuClientEfl):
(ContextMenuClientEfl::getContextMenuFromProposedMenu):
* UIProcess/efl/ContextMenuClientEfl.h: Added.
(WebKit):
(ContextMenuClientEfl):
(WebKit::ContextMenuClientEfl::create):
* UIProcess/efl/PageClientBase.cpp:
(WebKit::PageClientBase::createContextMenuProxy):
* UIProcess/efl/WebContextMenuProxyEfl.cpp: Added.
(WebKit):
(WebKit::WebContextMenuProxyEfl::WebContextMenuProxyEfl):
(WebKit::WebContextMenuProxyEfl::~WebContextMenuProxyEfl):
(WebKit::WebContextMenuProxyEfl::showContextMenu):
(WebKit::WebContextMenuProxyEfl::hideContextMenu):
(WebKit::WebContextMenuProxyEfl::contextMenuItemSelected):
* UIProcess/efl/WebContextMenuProxyEfl.h: Added.
(WebKit):
(WebContextMenuProxyEfl):
(WebKit::WebContextMenuProxyEfl::create):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@135394 268f45cc-cd09-0410-ab3c-d52691b4dbfc