Check rect under-invalidations

third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h

 // 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.
 
 #ifndef DisplayItem_h
 #define DisplayItem_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/ContiguousContainer.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
@@ skipping 46 matching lines @@
     //   - enum value <Category>Last = <Category>First + <BaseCategory>Last - <BaseCategory>First;
     // - DEFINE_CONVERSION_METHODS(<Category>, <category>, <BaseCategory>, <baseCategory>) to define methods to
     //   convert types between the categories;
     enum Type {
         DrawingFirst,
         DrawingPaintPhaseFirst = DrawingFirst,
         DrawingPaintPhaseLast = DrawingFirst + PaintPhaseMax,
         BoxDecorationBackground,
         Caret,
         ColumnRules,
+        DebugDrawing,
         DebugRedFill,
         DocumentBackground,
         DragImage,
         SVGImage,
         LinkHighlight,
         ImageAreaFocusRing,
         PageOverlay,
         PageWidgetDelegateBackgroundFallback,
         PopupContainerBorder,
         PopupListBoxBackground,
@@ skipping 320 matching lines @@
     bool isEndAndPairedWith(DisplayItem::Type otherType) const override = 0;
 #endif
 
 private:
     bool isEnd() const final { return true; }
 };
 
 } // namespace blink
 
 #endif // DisplayItem_h