Ensure display item ids are unique for image areas

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 50 matching lines @@
         DrawingPaintPhaseFirst = DrawingFirst,
         DrawingPaintPhaseLast = DrawingFirst + PaintPhaseMax,
         BoxDecorationBackground,
         Caret,
         ColumnRules,
         DebugRedFill,
         DocumentBackground,
         DragImage,
         SVGImage,
         LinkHighlight,
+        ImageAreaFocusRing,
         PageOverlay,
         PageWidgetDelegateBackgroundFallback,
         PopupContainerBorder,
         PopupListBoxBackground,
         PopupListBoxRow,
         PrintedContentBackground,
         PrintedContentDestinationLocations,
         PrintedContentLineBoundary,
         PrintedContentPDFURLRect,
         Resizer,
@@ skipping 318 matching lines @@
     bool isEndAndPairedWith(DisplayItem::Type otherType) const override = 0;
 #endif
 
 private:
     bool isEnd() const final { return true; }
 };
 
 } // namespace blink
 
 #endif // DisplayItem_h