Improve handling of PaintInvalidationLayer (renamed to PaintInvalidationSubtree)

third_party/WebKit/Source/platform/graphics/PaintInvalidationReason.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 PaintInvalidationReason_h
 #define PaintInvalidationReason_h
 
 #include "platform/PlatformExport.h"
 
 namespace blink {
@@ skipping 11 matching lines @@
     PaintInvalidationContentBoxChange,
     PaintInvalidationLayoutOverflowBoxChange,
     PaintInvalidationBoundsChange,
     PaintInvalidationLocationChange,
     PaintInvalidationBackgroundObscurationChange,
     PaintInvalidationBecameVisible,
     PaintInvalidationBecameInvisible,
     PaintInvalidationScroll,
     PaintInvalidationSelection,
     PaintInvalidationOutline,
-    PaintInvalidationLayer,
+    PaintInvalidationSubtree,
     PaintInvalidationLayoutObjectInsertion,
     PaintInvalidationLayoutObjectRemoval,
     PaintInvalidationSVGResourceChange,
     // PaintInvalidationDelayedFull means that PaintInvalidationFull is needed in order to fully paint
     // the content, but that painting of the object can be delayed until a future frame.
     // This can be the case for an object whose content is not visible to the user.
     PaintInvalidationDelayedFull
 };
 
 PLATFORM_EXPORT const char* paintInvalidationReasonToString(PaintInvalidationReason);
 
 inline bool isFullPaintInvalidationReason(PaintInvalidationReason reason)
 {
     return reason >= PaintInvalidationFull;
 }
 
 } // namespace blink
 
 #endif // PaintInvalidationReason_h