Remove position: sticky

Source/core/rendering/compositing/CompositingReasonFinder.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/rendering/compositing/CompositingReasonFinder.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
@@ skipping 22 matching lines @@
     if (settings.compositedScrollingForFramesEnabled())
         m_compositingTriggers |= ScrollableInnerFrameTrigger;
     if (settings.acceleratedCompositingForFiltersEnabled())
         m_compositingTriggers |= FilterTrigger;
 
     // We map both these settings to universal overlow scrolling.
     // FIXME: Replace these settings with a generic compositing setting for HighDPI.
     if (settings.acceleratedCompositingForOverflowScrollEnabled() || settings.compositorDrivenAcceleratedScrollingEnabled())
         m_compositingTriggers |= OverflowScrollTrigger;
 
-    // FIXME: acceleratedCompositingForFixedPositionEnabled should be renamed acceleratedCompositingForViewportConstrainedPositionEnabled().
-    // Or the sticky and fixed position elements should be behind different flags.
     if (settings.acceleratedCompositingForFixedPositionEnabled())
         m_compositingTriggers |= ViewportConstrainedPositionedTrigger;
 }
 
 bool CompositingReasonFinder::hasOverflowScrollTrigger() const
 {
     return m_compositingTriggers & OverflowScrollTrigger;
 }
 
 bool CompositingReasonFinder::isMainFrame() const
@@ skipping 201 matching lines @@
             if (viewportConstrainedNotCompositedReason)
                 *viewportConstrainedNotCompositedReason = RenderLayer::NotCompositedForBoundsOutOfView;
             return false;
         }
     }
 
     return true;
 }
 
 }