Make compositing updates 30.7% faster for calculator

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 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef RenderLayerCompositor_h
 #define RenderLayerCompositor_h
 
 #include "core/page/ChromeClient.h"
 #include "core/rendering/RenderLayer.h"
+#include "core/rendering/compositing/CompositingPropertyUpdater.h"
 #include "core/rendering/compositing/CompositingReasonFinder.h"
 #include "core/rendering/compositing/GraphicsLayerUpdater.h"
 #include "platform/graphics/GraphicsLayerClient.h"
 #include "wtf/HashMap.h"
 
 namespace WebCore {
 
 class FixedPositionViewportConstraints;
 class GraphicsLayer;
 class RenderEmbeddedObject;
@@ skipping 14 matching lines @@
 // RenderLayerCompositor manages the hierarchy of
 // composited RenderLayers. It determines which RenderLayers
 // become compositing, and creates and maintains a hierarchy of
 // GraphicsLayers based on the RenderLayer painting order.
 //
 // There is one RenderLayerCompositor per RenderView.
 
 class RenderLayerCompositor FINAL : public GraphicsLayerClient {
     WTF_MAKE_FAST_ALLOCATED;
 public:
-    enum BoundsUpdateType {
-        DoNotForceUpdate,
-        ForceUpdate,
-    };
-
     // FIXME: This constructor should take a reference.
     explicit RenderLayerCompositor(RenderView&);
     virtual ~RenderLayerCompositor();
 
     // Return true if this RenderView is in "compositing mode" (i.e. has one or more
     // composited RenderLayers)
     bool inCompositingMode() const { return m_compositing; }
     // This will make a compositing layer at the root automatically, and hook up to
     // the native view/window system.
     void enableCompositingMode(bool enable = true);
@@ skipping 246 matching lines @@
     OwnPtr<GraphicsLayer> m_rootTransformLayer;
 
     CompositingReasonFinder m_compositingReasonFinder;
 
     bool m_hasAcceleratedCompositing;
     bool m_showRepaintCounter;
 
     // FIXME: This should absolutely not be mutable.
     mutable bool m_needsToRecomputeCompositingRequirements;
     bool m_needsToUpdateLayerTreeGeometry;
+
+    // FIXME: We should remove m_pendingUpdateType and propagate the bits with CompositingPropertyUpdater instead.
     GraphicsLayerUpdater::UpdateType m_pendingUpdateType;
-
-    RenderLayerCompositor::BoundsUpdateType m_recomputeLayerBoundsUpdateType;
+    CompositingPropertyUpdater::UpdateType m_pendingPropertyUpdateType;
 
     bool m_compositing;
     bool m_compositingLayersNeedRebuild;
     bool m_forceCompositingMode;
     bool m_needsUpdateCompositingRequirementsState;
 
     bool m_isTrackingRepaints; // Used for testing.
 
     RootLayerAttachment m_rootLayerAttachment;
 
@@ skipping 17 matching lines @@
     OwnPtr<GraphicsLayer> m_layerForScrollCorner;
 #if USE(RUBBER_BANDING)
     OwnPtr<GraphicsLayer> m_layerForOverhangShadow;
 #endif
 };
 
 
 } // namespace WebCore
 
 #endif // RenderLayerCompositor_h