Issue repaints for RenderLayers that get new composited backings after

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 f55e188e6330e915634c303d81030dca8353b2e4..ba255d2fd925a04a52005d7c17e03831343e03c2 100644
--- a/Source/core/rendering/compositing/CompositingLayerAssigner.h
+++ b/Source/core/rendering/compositing/CompositingLayerAssigner.h
@@ -40,7 +40,7 @@ public:
     explicit CompositingLayerAssigner(RenderLayerCompositor*);
     ~CompositingLayerAssigner();
 
-    void assign(RenderLayer* updateRoot, bool& layersChanged);
+    void assign(RenderLayer* updateRoot, bool& layersChanged, Vector<RenderLayer*>& layersNeedingRepaint);
 
     // FIXME: This function should be private. We should remove the one caller
     // once we've fixed the compositing chicken/egg issues.
@@ -77,13 +77,15 @@ private:
         uint64_t totalAreaOfSquashedRects;
     };
 
-    void assignLayersToBackingsInternal(RenderLayer*, SquashingState&, bool& layersChanged);
-    void assignLayersToBackingsForReflectionLayer(RenderLayer* reflectionLayer, bool& layersChanged);
+    void assignLayersToBackingsInternal(RenderLayer*, SquashingState&, bool& layersChanged, Vector<RenderLayer*>& layersNeedingRepaint);
+    void assignLayersToBackingsForReflectionLayer(RenderLayer* reflectionLayer, bool& layersChanged, Vector<RenderLayer*>& layersNeedingRepaint);
     bool canSquashIntoCurrentSquashingOwner(const RenderLayer*, const SquashingState&);
     bool squashingWouldExceedSparsityTolerance(const RenderLayer* candidate, const SquashingState&);
-    bool updateSquashingAssignment(RenderLayer*, SquashingState&, CompositingStateTransitionType);
+    bool updateSquashingAssignment(RenderLayer*, SquashingState&, CompositingStateTransitionType, Vector<RenderLayer*>& layersNeedingRepaint);
     bool needsOwnBacking(const RenderLayer*) const;
 
+    Vector<RenderLayer*> m_layersNeedingRepaint;

[Ian Vollick, 2014/06/04 04:40:35]

(Note: we've chatted about removing this offline; it's already gone).

[chrishtr, 2014/06/04 16:35:55]

Done.

+
     RenderLayerCompositor* m_compositor;
     bool m_layerSquashingEnabled;
 };