Issue paint invalidations before and after changing offsetFromRenderer and reconfiguring

Source/core/rendering/compositing/GraphicsLayerUpdater.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Google 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
@@ skipping 44 matching lines @@
 
 GraphicsLayerUpdater::GraphicsLayerUpdater()
     : m_needsRebuildTree(false)
 {
 }
 
 GraphicsLayerUpdater::~GraphicsLayerUpdater()
 {
 }
 
-void GraphicsLayerUpdater::update(RenderLayer& layer, UpdateType updateType, const UpdateContext& context)
+void GraphicsLayerUpdater::update(Vector<RenderLayer*>& layersNeedingPaintInvalidation, RenderLayer& layer, UpdateType updateType, const UpdateContext& context)
 {
     if (layer.hasCompositedLayerMapping()) {
         CompositedLayerMappingPtr mapping = layer.compositedLayerMapping();
 
         const RenderLayer* compositingContainer = context.compositingContainer(layer);
         ASSERT(compositingContainer == layer.ancestorCompositingLayer());
         if (mapping->updateRequiresOwnBackingStoreForAncestorReasons(compositingContainer))
             updateType = ForceUpdate;
 
         // Note carefully: here we assume that the compositing state of all descendants have been updated already,
         // so it is legitimate to compute and cache the composited bounds for this layer.
         mapping->updateCompositedBounds(updateType);
 
         if (RenderLayerReflectionInfo* reflection = layer.reflectionInfo()) {
             if (reflection->reflectionLayer()->hasCompositedLayerMapping())
                 reflection->reflectionLayer()->compositedLayerMapping()->updateCompositedBounds(ForceUpdate);
         }
 
         if (mapping->updateGraphicsLayerConfiguration(updateType))
             m_needsRebuildTree = true;
 
-        mapping->updateGraphicsLayerGeometry(updateType, compositingContainer);
+        mapping->updateGraphicsLayerGeometry(updateType, compositingContainer, layersNeedingPaintInvalidation);
 
         updateType = mapping->updateTypeForChildren(updateType);
         mapping->clearNeedsGraphicsLayerUpdate();
 
         if (!layer.parent())
             layer.compositor()->updateRootLayerPosition();
 
         if (mapping->hasUnpositionedOverflowControlsLayers())
             layer.scrollableArea()->positionOverflowControls(IntSize());
     }
 
     UpdateContext childContext(context, layer);
     for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
-        update(*child, updateType, childContext);
+        update(layersNeedingPaintInvalidation, *child, updateType, childContext);
 }
 
 #if ASSERT_ENABLED
 
 void GraphicsLayerUpdater::assertNeedsToUpdateGraphicsLayerBitsCleared(RenderLayer& layer)
 {
     if (layer.hasCompositedLayerMapping())
         layer.compositedLayerMapping()->assertNeedsToUpdateGraphicsLayerBitsCleared();
 
     for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
         assertNeedsToUpdateGraphicsLayerBitsCleared(*child);
 }
 
 #endif
 
 } // namespace WebCore