Avoid duplicating the BleedAvoidanceIsClipping function in Blink paint

third_party/WebKit/Source/core/paint/BoxBorderPainter.cpp

Index: third_party/WebKit/Source/core/paint/BoxBorderPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/BoxBorderPainter.cpp b/third_party/WebKit/Source/core/paint/BoxBorderPainter.cpp
index 404322f33ade458bc3e109a046d9f9ec8040df7c..0aef28940af4ff5b3498e96c200f21cef38e338a 100644
--- a/third_party/WebKit/Source/core/paint/BoxBorderPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/BoxBorderPainter.cpp
@@ -334,11 +334,6 @@ void DrawBleedAdjustedDRRect(GraphicsContext& context,
   }
 }
 
-bool BleedAvoidanceIsClipping(BackgroundBleedAvoidance bleed_avoidance) {
-  return bleed_avoidance == kBackgroundBleedClipOnly ||
-         bleed_avoidance == kBackgroundBleedClipLayer;
-}
-
 // The LUTs below assume specific enum values.
 static_assert(kBorderStyleNone == 0, "unexpected EBorderStyle value");
 static_assert(kBorderStyleHidden == 1, "unexpected EBorderStyle value");