Convert LayoutState/LayoutStateMaintainer/LayoutStateDisabler to references

Source/core/rendering/RenderFlowThread.cpp

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. 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.
@@ skipping 193 matching lines @@
         return false;
 
     return true;
 }
 
 void RenderFlowThread::repaintRectangleInRegions(const LayoutRect& repaintRect) const
 {
     if (!shouldRepaint(repaintRect) || !hasValidRegionInfo())
         return;
 
-    LayoutStateDisabler layoutStateDisabler(view()); // We can't use layout state to repaint, since the regions are somewhere else.
+    LayoutStateDisabler layoutStateDisabler(*this); // We can't use layout state to repaint, since the regions are somewhere else.
 
     // We can't use currentFlowThread as it is possible to have interleaved flow threads and the wrong one could be used.
     // Let each region figure out the proper enclosing flow thread.
     CurrentRenderFlowThreadDisabler disabler(view());
 
     for (RenderRegionList::const_iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) {
         RenderRegion* region = *iter;
 
         region->repaintFlowThreadContent(repaintRect);
     }
@@ skipping 334 matching lines @@
 
 const RenderBox* RenderFlowThread::currentStatePusherRenderBox() const
 {
     const RenderObject* currentObject = m_statePusherObjectsStack.isEmpty() ? 0 : m_statePusherObjectsStack.last();
     if (currentObject && currentObject->isBox())
         return toRenderBox(currentObject);
 
     return 0;
 }
 
-void RenderFlowThread::pushFlowThreadLayoutState(const RenderObject* object)
+void RenderFlowThread::pushFlowThreadLayoutState(const RenderObject& object)
 {
     if (const RenderBox* currentBoxDescendant = currentStatePusherRenderBox()) {
         LayoutState* layoutState = currentBoxDescendant->view()->layoutState();
         if (layoutState && layoutState->isPaginated()) {
             ASSERT(layoutState->renderer() == currentBoxDescendant);
             LayoutSize offsetDelta = layoutState->m_layoutOffset - layoutState->m_pageOffset;
             setOffsetFromLogicalTopOfFirstRegion(currentBoxDescendant, currentBoxDescendant->isHorizontalWritingMode() ? offsetDelta.height() : offsetDelta.width());
         }
     }
 
-    m_statePusherObjectsStack.add(object);
+    m_statePusherObjectsStack.add(&object);
 }
 
 void RenderFlowThread::popFlowThreadLayoutState()
 {
     m_statePusherObjectsStack.removeLast();
 
     if (const RenderBox* currentBoxDescendant = currentStatePusherRenderBox()) {
         LayoutState* layoutState = currentBoxDescendant->view()->layoutState();
         if (layoutState && layoutState->isPaginated())
             clearOffsetFromLogicalTopOfFirstRegion(currentBoxDescendant);
@@ skipping 79 matching lines @@
 {
     if (!m_renderFlowThread)
         return;
     RenderView* view = m_renderFlowThread->view();
     ASSERT(view->flowThreadController()->currentRenderFlowThread() == m_renderFlowThread);
     view->flowThreadController()->setCurrentRenderFlowThread(m_previousRenderFlowThread);
 }
 
 
 } // namespace WebCore