Remove more dead code from core/ folder

Source/core/page/FocusController.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 206 matching lines @@
 {
     ASSERT(node);
     return (node->isElementNode() && toElement(node)->isKeyboardFocusable()) || isNonFocusableFocusScopeOwner(node);
 }
 
 FocusController::FocusController(Page* page)
     : m_page(page)
     , m_isActive(false)
     , m_isFocused(false)
     , m_isChangingFocusedFrame(false)
-    , m_containingWindowIsVisible(false)
 {
 }
 
 PassOwnPtr<FocusController> FocusController::create(Page* page)
 {
     return adoptPtr(new FocusController(page));
 }
 
 void FocusController::setFocusedFrame(PassRefPtr<Frame> frame)
 {
@@ skipping 448 matching lines @@
         return;
 
     m_isActive = active;
 
     if (FrameView* view = m_page->mainFrame()->view())
         view->updateControlTints();
 
     toLocalFrame(focusedOrMainFrame())->selection().pageActivationChanged();
 }
 
-static void contentAreaDidShowOrHide(ScrollableArea* scrollableArea, bool didShow)
-{
-    if (didShow)
-        scrollableArea->contentAreaDidShow();
-    else
-        scrollableArea->contentAreaDidHide();
-}
-
-void FocusController::setContainingWindowIsVisible(bool containingWindowIsVisible)
-{
-    if (m_containingWindowIsVisible == containingWindowIsVisible)
-        return;
-
-    m_containingWindowIsVisible = containingWindowIsVisible;
-
-    FrameView* view = m_page->mainFrame()->view();
-    if (!view)
-        return;
-
-    contentAreaDidShowOrHide(view, containingWindowIsVisible);
-
-    for (LocalFrame* frame = m_page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
-        FrameView* frameView = frame->view();
-        if (!frameView)
-            continue;
-
-        const HashSet<ScrollableArea*>* scrollableAreas = frameView->scrollableAreas();
-        if (!scrollableAreas)
-            continue;
-
-        for (HashSet<ScrollableArea*>::const_iterator it = scrollableAreas->begin(), end = scrollableAreas->end(); it != end; ++it) {
-            ScrollableArea* scrollableArea = *it;
-            ASSERT(scrollableArea->scrollbarsCanBeActive());
-
-            contentAreaDidShowOrHide(scrollableArea, containingWindowIsVisible);
-        }
-    }
-}
-
 static void updateFocusCandidateIfNeeded(FocusType type, const FocusCandidate& current, FocusCandidate& candidate, FocusCandidate& closest)
 {
     ASSERT(candidate.visibleNode->isElementNode());
     ASSERT(candidate.visibleNode->renderer());
 
     // Ignore iframes that don't have a src attribute
     if (frameOwnerElement(candidate) && (!frameOwnerElement(candidate)->contentFrame() || candidate.rect.isEmpty()))
         return;
 
     // Ignore off screen child nodes of containers that do not scroll (overflow:hidden)
@@ skipping 172 matching lines @@
         startingRect = nodeRectInAbsoluteCoordinates(container, true /* ignore border */);
         container = scrollableEnclosingBoxOrParentFrameForNodeInDirection(type, container);
         if (container && container->isDocumentNode())
             toDocument(container)->updateLayoutIgnorePendingStylesheets();
     } while (!consumed && container);
 
     return consumed;
 }
 
 } // namespace WebCore