Clean up BoxClipper

Source/platform/graphics/paint/DisplayItem.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "platform/graphics/paint/DisplayItem.h"
 
 namespace blink {
 
 struct SameSizeAsDisplayItem {
@@ skipping 130 matching lines @@
 {
     if (isDrawingType(type))
         return drawingTypeAsDebugString(type);
     if (isCachedType(type))
         return "Cached" + drawingTypeAsDebugString(cachedTypeToDrawingType(type));
     if (isClipType(type))
         return clipTypeAsDebugString(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));
 
     PAINT_PHASE_BASED_DEBUG_STRINGS(Scroll);
     if (isEndScrollType(type))
         return "End" + typeAsDebugString(endScrollTypeToScrollType(type));
 
     if (isTransform3DType(type))
         return transform3DTypeAsDebugString(type);
@@ skipping 42 matching lines @@
     stringBuilder.append('"');
     if (m_skippedCache)
         stringBuilder.append(", skippedCache: true");
     if (m_scopeContainer)
         stringBuilder.append(String::format(", scope: \"%p,%d\"", m_scopeContainer, m_scopeId));
 }
 
 #endif
 
 } // namespace blink