Clean up BoxClipper

Source/platform/graphics/paint/DisplayItem.cpp

Index: Source/platform/graphics/paint/DisplayItem.cpp
diff --git a/Source/platform/graphics/paint/DisplayItem.cpp b/Source/platform/graphics/paint/DisplayItem.cpp
index 58b42d478555af9c107f94ffbf8970ca5c0fd752..c5ea8215da9c523be93db06cc0d55cc498b57665 100644
--- a/Source/platform/graphics/paint/DisplayItem.cpp
+++ b/Source/platform/graphics/paint/DisplayItem.cpp
@@ -148,6 +148,9 @@ WTF::String DisplayItem::typeAsDebugString(Type type)
     if (isEndClipType(type))
         return "End" + clipTypeAsDebugString(endClipTypeToClipType(type));
 
+    if (type == UninitializedType)
+        return "UninitializedType";
+
     PAINT_PHASE_BASED_DEBUG_STRINGS(FloatClip);
     if (isEndFloatClipType(type))
         return "End" + typeAsDebugString(endFloatClipTypeToFloatClipType(type));