[Invalidation Tracking] Add trace events for compositor based invalidations

Source/core/rendering/compositing/CompositingLayerAssigner.h

Index: Source/core/rendering/compositing/CompositingLayerAssigner.h
diff --git a/Source/core/rendering/compositing/CompositingLayerAssigner.h b/Source/core/rendering/compositing/CompositingLayerAssigner.h
index 4f99995a8653c2bf193ab55adb3fe8dcbbb500b5..b2e439a0b10279aff7b76d4f35368f7303264c76 100644
--- a/Source/core/rendering/compositing/CompositingLayerAssigner.h
+++ b/Source/core/rendering/compositing/CompositingLayerAssigner.h
@@ -27,6 +27,7 @@
 #ifndef CompositingLayerAssigner_h
 #define CompositingLayerAssigner_h
 
+#include "core/rendering/compositing/GraphicsLayerUpdater.h"
 #include "core/rendering/compositing/RenderLayerCompositor.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/LayoutPoint.h"
@@ -40,7 +41,7 @@ public:
     explicit CompositingLayerAssigner(RenderLayerCompositor*);
     ~CompositingLayerAssigner();
 
-    void assign(RenderLayer* updateRoot, Vector<RenderLayer*>& layersNeedingPaintInvalidation);
+    void assign(RenderLayer* updateRoot, LayersNeedingPaintInvalidation&);
 
     bool layersChanged() const { return m_layersChanged; }
 
@@ -79,11 +80,11 @@ private:
         uint64_t totalAreaOfSquashedRects;
     };
 
-    void assignLayersToBackingsInternal(RenderLayer*, SquashingState&, Vector<RenderLayer*>& layersNeedingPaintInvalidation);
-    void assignLayersToBackingsForReflectionLayer(RenderLayer* reflectionLayer, Vector<RenderLayer*>& layersNeedingPaintInvalidation);
+    void assignLayersToBackingsInternal(RenderLayer*, SquashingState&, LayersNeedingPaintInvalidation&);
+    void assignLayersToBackingsForReflectionLayer(RenderLayer* reflectionLayer, LayersNeedingPaintInvalidation&);
     CompositingReasons getReasonsPreventingSquashing(const RenderLayer*, const SquashingState&);
     bool squashingWouldExceedSparsityTolerance(const RenderLayer* candidate, const SquashingState&);
-    void updateSquashingAssignment(RenderLayer*, SquashingState&, CompositingStateTransitionType, Vector<RenderLayer*>& layersNeedingPaintInvalidation);
+    void updateSquashingAssignment(RenderLayer*, SquashingState&, CompositingStateTransitionType, LayersNeedingPaintInvalidation&);
     bool needsOwnBacking(const RenderLayer*) const;
 
     RenderLayerCompositor* m_compositor;