Cleanup constants for layerTreeAsText.

Source/core/platform/graphics/GraphicsLayerClient.h

Index: Source/core/platform/graphics/GraphicsLayerClient.h
diff --git a/Source/core/platform/graphics/GraphicsLayerClient.h b/Source/core/platform/graphics/GraphicsLayerClient.h
index 277deeb7a9e298eb85983a44b68c7b40dc878c38..662ec203bedc8793b58c8f22702b06097272b795 100644
--- a/Source/core/platform/graphics/GraphicsLayerClient.h
+++ b/Source/core/platform/graphics/GraphicsLayerClient.h
@@ -53,6 +53,14 @@ enum AnimatedPropertyID {
     AnimatedPropertyWebkitFilter
 };
 
+enum {
+    LayerTreeNormal = 0,
+    LayerTreeIncludesDebugInfo = 1 << 0, // Dump extra debugging info like layer addresses.
+    LayerTreeIncludesRepaintRects = 1 << 1,
+    LayerTreeIncludesPaintingPhases = 1 << 2
+};
+typedef unsigned LayerTreeFlags;
+
 class GraphicsLayerClient {
 public:
     virtual ~GraphicsLayerClient() {}