Slimming Paint phase 2 compositing algorithm plumbing & skeleton display list API.

Source/web/LinkHighlight.h

Index: Source/web/LinkHighlight.h
diff --git a/Source/web/LinkHighlight.h b/Source/web/LinkHighlight.h
index 09bba690b78f35480c76785a8d6935aafcaea53c..ad7df046373843928e346a49d12dc8d2587ae9b8 100644
--- a/Source/web/LinkHighlight.h
+++ b/Source/web/LinkHighlight.h
@@ -30,6 +30,7 @@
 #include "platform/geometry/IntPoint.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/Path.h"
+#include "platform/graphics/paint/DisplayItemClient.h"
 #include "public/platform/WebCompositorAnimationDelegate.h"
 #include "public/platform/WebContentLayer.h"
 #include "public/platform/WebContentLayerClient.h"
@@ -39,6 +40,7 @@
 
 namespace blink {
 
+class DisplayItemList;
 class LayoutBoxModelObject;
 class Node;
 struct WebRect;
@@ -69,6 +71,7 @@ public:
 
     GraphicsLayer* currentGraphicsLayerForTesting() const { return m_currentGraphicsLayer; }
 
+
 private:
     LinkHighlight(Node*, WebViewImpl*);