Move RenderLayerCompositor trigger caching to be when settings change

Source/core/rendering/compositing/RenderLayerCompositor.h

 /*
  * Copyright (C) 2009 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 71 matching lines @@
     bool hasAcceleratedCompositing() const { return m_hasAcceleratedCompositing; }
     bool layerSquashingEnabled() const;
 
     bool legacyOrCurrentAcceleratedCompositingForOverflowScrollEnabled() const;
     bool legacyAcceleratedCompositingForOverflowScrollEnabled() const;
 
     bool acceleratedCompositingForOverflowScrollEnabled() const;
 
     bool canRender3DTransforms() const;
 
+    void updateForceCompositingMode();
+
     // Copy the accelerated compositing related flags from Settings
-    void cacheAcceleratedCompositingFlags();
+    void updateAcceleratedCompositingSettings();
 
     // Called when the layer hierarchy needs to be updated (compositing layers have been
     // created, destroyed or re-parented).
     void setCompositingLayersNeedRebuild();
 
     // Updating properties required for determining if compositing is necessary.
     void updateCompositingRequirementsState();
     void setNeedsUpdateCompositingRequirementsState() { m_needsUpdateCompositingRequirementsState = true; }
 
     // Used to indicate that a compositing update will be needed for the next frame that gets drawn.
@@ skipping 246 matching lines @@
     OwnPtr<GraphicsLayer> m_layerForVerticalScrollbar;
     OwnPtr<GraphicsLayer> m_layerForScrollCorner;
 #if USE(RUBBER_BANDING)
     OwnPtr<GraphicsLayer> m_layerForOverhangShadow;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // RenderLayerCompositor_h