PageOverlays: Remove PageOverlayList

Source/web/PageOverlay.h

Index: Source/web/PageOverlay.h
diff --git a/Source/web/PageOverlay.h b/Source/web/PageOverlay.h
index b8467c6a781c3ca6e81e8c71d909b1360454a18f..5342f1933cc540905135d050277e22bed030d6ee 100644
--- a/Source/web/PageOverlay.h
+++ b/Source/web/PageOverlay.h
@@ -29,6 +29,7 @@
 #ifndef PageOverlay_h
 #define PageOverlay_h
 
+#include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/GraphicsLayerClient.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
 #include "wtf/OwnPtr.h"
@@ -38,7 +39,6 @@
 namespace blink {
 
 class GraphicsContext;
-class GraphicsLayer;
 class WebPageOverlay;
 class WebViewImpl;
 
@@ -56,9 +56,6 @@ public:
     WebPageOverlay* overlay() const { return m_overlay; }
     void setOverlay(WebPageOverlay* overlay) { m_overlay = overlay; }
 
-    int zOrder() const { return m_zOrder; }
-    void setZOrder(int zOrder) { m_zOrder = zOrder; }
-
     void clear();
     void update();
     void paintWebFrame(GraphicsContext&);
@@ -78,7 +75,6 @@ private:
     WebViewImpl* m_viewImpl;
     WebPageOverlay* m_overlay;
     OwnPtr<GraphicsLayer> m_layer;
-    int m_zOrder;
 };
 
 } // namespace blink