Paint invalidation of local attachment backgrounds

third_party/WebKit/Source/platform/graphics/PaintInvalidationReason.cpp

Index: third_party/WebKit/Source/platform/graphics/PaintInvalidationReason.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/PaintInvalidationReason.cpp b/third_party/WebKit/Source/platform/graphics/PaintInvalidationReason.cpp
index 79779dc7c51f440d60f4d959182944003e881537..14abde1c609a73f1f168a0b02b5a35099cd77448 100644
--- a/third_party/WebKit/Source/platform/graphics/PaintInvalidationReason.cpp
+++ b/third_party/WebKit/Source/platform/graphics/PaintInvalidationReason.cpp
@@ -54,6 +54,8 @@ const char* paintInvalidationReasonToString(PaintInvalidationReason reason) {
       return "layoutObject removal";
     case PaintInvalidationSVGResourceChange:
       return "SVG resource change";
+    case PaintInvalidationBackgroundOnScrollingContentsLayer:
+      return "background on scrolling contents layer";
     case PaintInvalidationForTesting:
       return "for testing";
     case PaintInvalidationDelayedFull: