Simplify popup menu handling.

Reviewed by Adam Roben.

* platform/PopupMenuClient.h:
Rename hidePopup to popupDidHide.
        
* platform/chromium/PopupMenuChromium.cpp:
(WebCore::PopupListBox::handleKeyEvent):        
(WebCore::PopupListBox::abandon):
(WebCore::PopupListBox::acceptIndex):
Call popupDidHide instead of hidePopup.
        
* platform/gtk/PopupMenuGtk.cpp:
(WebCore::PopupMenu::menuUnmapped):
Ditto.
        
* platform/mac/PopupMenuMac.mm:
(WebCore::PopupMenu::show):
Ditto.
        
* platform/win/PopupMenuWin.cpp:
(WebCore::PopupMenu::hide):
Call popupDidHide.
        
(WebCore::PopupWndProc):
Call PopupMenu::hide.
        
* platform/wx/PopupMenuWx.cpp:
(WebCore::PopupMenu::OnMenuItemSelected):
Call popupDidHide.
        
* rendering/RenderMenuList.cpp:
(WebCore::RenderMenuList::hidePopup):
(WebCore::RenderMenuList::popupDidHide):
* rendering/RenderMenuList.h:
Set the "popup is visible" flag in popupDidHide.
        
* rendering/RenderTextControlSingleLine.cpp:
(WebCore::RenderTextControlSingleLine::hidePopup):
(WebCore::RenderTextControlSingleLine::popupDidHide):
* rendering/RenderTextControlSingleLine.h:
Ditto.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@48370 268f45cc-cd09-0410-ab3c-d52691b4dbfc