[Layout API] Use FrameView::layoutViewItem() in LayoutPart.cpp

third_party/WebKit/Source/core/layout/LayoutPart.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 111 matching lines @@
         return true;
 
     if (!node() || !node()->isFrameOwnerElement())
         return false;
 
     HTMLFrameOwnerElement* element = toHTMLFrameOwnerElement(node());
     if (element->contentFrame() && element->contentFrame()->isRemoteFrame())
         return true;
 
     if (Document* contentDocument = element->contentDocument()) {
-        if (LayoutView* view = contentDocument->layoutView())
-            return view->usesCompositing();
+        LayoutViewItem viewItem = contentDocument->layoutViewItem();
+        if (!viewItem.isNull())
+            return viewItem.usesCompositing();
     }
 
     return false;
 }
 
 bool LayoutPart::needsPreferredWidthsRecalculation() const
 {
     if (LayoutReplaced::needsPreferredWidthsRecalculation())
         return true;
     return embeddedReplacedContent();
@@ skipping 17 matching lines @@
 
     // A hit test can never hit an off-screen element; only off-screen iframes are throttled;
     // therefore, hit tests can skip descending into throttled iframes.
     if (toFrameView(widget())->shouldThrottleRendering())
         return nodeAtPointOverWidget(result, locationInContainer, accumulatedOffset, action);
 
     ASSERT(document().lifecycle().state() >= DocumentLifecycle::CompositingClean);
 
     if (action == HitTestForeground) {
         FrameView* childFrameView = toFrameView(widget());
-        LayoutView* childRoot = childFrameView->layoutView();
+        LayoutViewItem childRootItem = childFrameView->layoutViewItem();
 
-        if (visibleToHitTestRequest(result.hitTestRequest()) && childRoot) {
+        if (visibleToHitTestRequest(result.hitTestRequest()) && !childRootItem.isNull()) {
             LayoutPoint adjustedLocation = accumulatedOffset + location();
             LayoutPoint contentOffset = LayoutPoint(borderLeft() + paddingLeft(), borderTop() + paddingTop()) - LayoutSize(childFrameView->scrollOffset());
             HitTestLocation newHitTestLocation(locationInContainer, -adjustedLocation - contentOffset);
             HitTestRequest newHitTestRequest(result.hitTestRequest().type() | HitTestRequest::ChildFrameHitTest);
             HitTestResult childFrameResult(newHitTestRequest, newHitTestLocation);
 
             // The frame's layout and style must be up-to-date if we reach here.
-            bool isInsideChildFrame = childRoot->hitTestNoLifecycleUpdate(childFrameResult);
+            bool isInsideChildFrame = childRootItem.hitTestNoLifecycleUpdate(childFrameResult);
 
             if (result.hitTestRequest().listBased()) {
                 result.append(childFrameResult);
             } else if (isInsideChildFrame) {
                 // Force the result not to be cacheable because the parent
                 // frame should not cache this result; as it won't be notified of
                 // changes in the child.
                 childFrameResult.setCacheable(false);
                 result = childFrameResult;
             }
@@ skipping 178 matching lines @@
 
 bool LayoutPart::isThrottledFrameView() const
 {
     if (!widget() || !widget()->isFrameView())
         return false;
     const FrameView* frameView = toFrameView(widget());
     return frameView->shouldThrottleRendering();
 }
 
 } // namespace blink