[Layout API] Convert (most of) FrameSelection to use Document::layoutViewItem()

third_party/WebKit/Source/core/editing/FrameSelection.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 452 matching lines @@
             m_selectionEditor->setWithoutValidation(selection().end(), selection().start());
     } else if (intersectsNode(selection(), &node)) {
         // If we did nothing here, when this node's layoutObject was destroyed, the rect that it
         // occupied would be invalidated, but, selection gaps that change as a result of
         // the removal wouldn't be invalidated.
         // FIXME: Don't do so much unnecessary invalidation.
         clearLayoutTreeSelection = true;
     }
 
     if (clearLayoutTreeSelection)
-        selection().start().document()->layoutView()->clearSelection();
+        selection().start().document()->layoutViewItem().clearSelection();
 
     if (clearDOMTreeSelection)
         setSelection(VisibleSelection(), DoNotSetFocus);
 
     // TODO(yosin): We should move to call |TypingCommand::closeTyping()| to
     // |Editor| class.
     if (!m_frame->document()->isRunningExecCommand())
         TypingCommand::closeTyping(m_frame);
 }
 
@@ skipping 251 matching lines @@
 {
     if (selection().isCaret() && m_shouldPaintCaret) {
         m_caretBase->updateCaretRect(PositionWithAffinity(selection().start(), selection().affinity()));
         m_caretBase->paintCaret(selection().start().anchorNode(), context, paintOffset);
     }
 }
 
 bool FrameSelection::contains(const LayoutPoint& point)
 {
     Document* document = m_frame->document();
-    if (!document->layoutView())
+    if (document->layoutViewItem().isNull())
         return false;
 
     // Treat a collapsed selection like no selection.
     const VisibleSelectionInFlatTree& visibleSelection = this->visibleSelection<EditingInFlatTreeStrategy>();
     if (!visibleSelection.isRange())
         return false;
 
     HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
     HitTestResult result(request, point);
-    document->layoutView()->hitTest(result);
+    document->layoutViewItem().hitTest(result);
     Node* innerNode = result.innerNode();
     if (!innerNode || !innerNode->layoutObject())
         return false;
 
     const VisiblePositionInFlatTree& visiblePos = createVisiblePosition(fromPositionInDOMTree<EditingInFlatTreeStrategy>(innerNode->layoutObject()->positionForPoint(result.localPoint())));
     if (visiblePos.isNull())
         return false;
 
     const VisiblePositionInFlatTree& visibleStart = visibleSelection.visibleStart();
     const VisiblePositionInFlatTree& visibleEnd = visibleSelection.visibleEnd();
@@ skipping 160 matching lines @@
     // the focused element hasn't changed, the evaluation of focus pseudo
     // selectors are dependent on whether the frame is focused and active.
     if (Element* element = document->focusedElement())
         element->focusStateChanged();
 
     document->updateLayoutTree();
 
     // Because LayoutObject::selectionBackgroundColor() and
     // LayoutObject::selectionForegroundColor() check if the frame is active,
     // we have to update places those colors were painted.
-    if (LayoutView* view = document->layoutView())
-        view->invalidatePaintForSelection();
+    if (LayoutViewItem view = document->layoutViewItem())

[eae, 2016/04/17 18:17:50]

Can this still be null?

+        view.invalidatePaintForSelection();
 
     // Caret appears in the active frame.
     if (activeAndFocused)
         setSelectionFromNone();
     else
         m_frame->spellChecker().spellCheckAfterBlur();
     setCaretVisibility(activeAndFocused ? CaretVisibility::Visible : CaretVisibility::Hidden);
 
     // Update for caps lock state
     m_frame->eventHandler().capsLockStateMayHaveChanged();
@@ skipping 471 matching lines @@
 
 void showTree(const blink::FrameSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil) FrameSelection.\n");
 }
 
 #endif