Remove RenderLayerCompositor::m_viewportConstrainedLayers

Source/core/rendering/compositing/RenderLayerCompositor.cpp

Index: Source/core/rendering/compositing/RenderLayerCompositor.cpp
diff --git a/Source/core/rendering/compositing/RenderLayerCompositor.cpp b/Source/core/rendering/compositing/RenderLayerCompositor.cpp
index b08d68e0f2b22853a6eb1295a4426b0f687db506..e0e26b94d43910dcd75ad1b9c8241dc37fd39c5b 100644
--- a/Source/core/rendering/compositing/RenderLayerCompositor.cpp
+++ b/Source/core/rendering/compositing/RenderLayerCompositor.cpp
@@ -546,8 +546,6 @@ bool RenderLayerCompositor::allocateOrClearCompositedLayerMapping(RenderLayer* l
                 }
             }
 
-            removeViewportConstrainedLayer(layer);
-
             layer->clearCompositedLayerMapping();
             compositedLayerMappingChanged = true;
 
@@ -659,8 +657,6 @@ void RenderLayerCompositor::layerWillBeRemoved(RenderLayer* parent, RenderLayer*
     if (!child->hasCompositedLayerMapping() || parent->renderer()->documentBeingDestroyed())
         return;
 
-    removeViewportConstrainedLayer(child);
-
     {
         // FIXME: This is called from within RenderLayer::removeChild, which is called from RenderObject::RemoveChild.
         // There's no guarantee that compositor state is up to date.
@@ -1405,24 +1401,6 @@ void RenderLayerCompositor::notifyIFramesOfCompositingChange()
     }
 }
 
-void RenderLayerCompositor::updateViewportConstraintStatus(RenderLayer* layer)
-{
-    if (CompositingReasonFinder::isViewportConstrainedFixedOrStickyLayer(layer))
-        addViewportConstrainedLayer(layer);
-    else
-        removeViewportConstrainedLayer(layer);
-}
-
-void RenderLayerCompositor::addViewportConstrainedLayer(RenderLayer* layer)
-{
-    m_viewportConstrainedLayers.add(layer);
-}
-
-void RenderLayerCompositor::removeViewportConstrainedLayer(RenderLayer* layer)
-{
-    m_viewportConstrainedLayers.remove(layer);
-}
-
 ScrollingCoordinator* RenderLayerCompositor::scrollingCoordinator() const
 {
     if (Page* page = this->page())