diff --git a/WebCompositorSupport.h b/WebCompositorSupport.h
index 1e4c6e2..b145343 100644
--- a/WebCompositorSupport.h
+++ b/WebCompositorSupport.h
@@ -68,6 +68,7 @@
     virtual void shutdown() { }
 
     // These may only be called before initialize.
+    // FIXME: Remove these.
     virtual void setPerTilePaintingEnabled(bool) { }
     virtual void setPartialSwapEnabled(bool) { }
     virtual void setAcceleratedAnimationEnabled(bool) { }
diff --git a/WebLayerTreeView.h b/WebLayerTreeView.h
index 345045a..01c789c 100644
--- a/WebLayerTreeView.h
+++ b/WebLayerTreeView.h
@@ -52,6 +52,10 @@
             , showPlatformLayerTree(false)
             , showPaintRects(false)
             , renderVSyncEnabled(true)
+            , perTilePaintingEnabled(false)
+            , partialSwapEnabled(false)
+            , acceleratedAnimationEnabled(false)
+            , pageScalePinchZoomEnabled(false)
             , refreshRate(0)
             , defaultTileSize(WebSize(256, 256))
             , maxUntiledLayerSize(WebSize(512, 512))
@@ -63,6 +67,10 @@
         bool showPlatformLayerTree;
         bool showPaintRects;
         bool renderVSyncEnabled;
+        bool perTilePaintingEnabled;
+        bool partialSwapEnabled;
+        bool acceleratedAnimationEnabled;
+        bool pageScalePinchZoomEnabled;
         double refreshRate;
         WebSize defaultTileSize;
         WebSize maxUntiledLayerSize;