Move RenderLayer repainting to repaint-after-layout framework.

Source/core/rendering/RenderLayerScrollableArea.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 323 matching lines @@
 }
 
 int RenderLayerScrollableArea::scrollSize(ScrollbarOrientation orientation) const
 {
     IntSize scrollDimensions = maximumScrollPosition() - minimumScrollPosition();
     return (orientation == HorizontalScrollbar) ? scrollDimensions.width() : scrollDimensions.height();
 }
 
 void RenderLayerScrollableArea::setScrollOffset(const IntPoint& newScrollOffset)
 {
+    LayoutRectRecorder recorder(*m_box);
+
     if (!m_box->isMarquee()) {
         // Ensure that the dimensions will be computed if they need to be (for overflow:hidden blocks).
         if (m_scrollDimensionsDirty)
             computeScrollDimensions();
     }
 
     if (scrollOffset() == toIntSize(newScrollOffset))
         return;
 
     setScrollOffset(toIntSize(newScrollOffset));
@@ skipping 16 matching lines @@
         // for now we just crash to avoid allowing an attacker to use after free.
         frameView->updateWidgetPositions();
         RELEASE_ASSERT(frameView->renderView());
         updateCompositingLayersAfterScroll();
     }
 
     RenderLayerModelObject* repaintContainer = m_box->containerForRepaint();
     // The caret rect needs to be invalidated after scrolling
     frame->selection().setCaretRectNeedsUpdate();
 
-    FloatQuad quadForFakeMouseMoveEvent = FloatQuad(layer()->repainter().repaintRect());
+    FloatQuad quadForFakeMouseMoveEvent;
+    if (RuntimeEnabledFeatures::repaintAfterLayoutEnabled())
+        quadForFakeMouseMoveEvent = FloatQuad(layer()->renderer()->newRepaintRect());
+    else
+        quadForFakeMouseMoveEvent = FloatQuad(layer()->repainter().repaintRect());
+
     if (repaintContainer)
         quadForFakeMouseMoveEvent = repaintContainer->localToAbsoluteQuad(quadForFakeMouseMoveEvent);
     frame->eventHandler().dispatchFakeMouseMoveEventSoonInQuad(quadForFakeMouseMoveEvent);
 
     bool requiresRepaint = true;
 
     if (m_box->view()->compositor()->inCompositingMode()) {
         bool onlyScrolledCompositedLayers = scrollsOverflow()
             && !layer()->hasVisibleNonLayerContent()
             && !layer()->hasNonCompositedChild()
             && !layer()->hasBlockSelectionGapBounds()
             && !m_box->isMarquee();
 
         if (usesCompositedScrolling() || onlyScrolledCompositedLayers)
             requiresRepaint = false;
     }
 
     // Just schedule a full repaint of our object.
     if (requiresRepaint) {
-        if (RuntimeEnabledFeatures::repaintAfterLayoutEnabled() && m_box->frameView()->isInPerformLayout())
-            m_box->setShouldDoFullRepaintAfterLayout(true);
-        else
+        if (RuntimeEnabledFeatures::repaintAfterLayoutEnabled()) {
+            if (m_box->frameView()->isInPerformLayout())
+                m_box->setShouldDoFullRepaintAfterLayout(true);
+            else
+                m_box->repaintUsingContainer(repaintContainer, pixelSnappedIntRect(layer()->renderer()->newRepaintRect()));
+        } else {
             m_box->repaintUsingContainer(repaintContainer, pixelSnappedIntRect(layer()->repainter().repaintRect()));
+        }
     }
 
     // Schedule the scroll DOM event.
     if (m_box->node())
         m_box->node()->document().enqueueScrollEventForNode(m_box->node());
 
     if (AXObjectCache* cache = m_box->document().existingAXObjectCache())
         cache->handleScrollPositionChanged(m_box);
 
     InspectorInstrumentation::didScrollLayer(m_box);
@@ skipping 1120 matching lines @@
 void RenderLayerScrollableArea::setForceNeedsCompositedScrolling(ForceNeedsCompositedScrollingMode mode)
 {
     if (m_forceNeedsCompositedScrolling == mode)
         return;
 
     m_forceNeedsCompositedScrolling = mode;
     layer()->didUpdateNeedsCompositedScrolling();
 }
 
 } // Namespace WebCore