Large canvas does not honor containing div's border radius

Source/core/platform/graphics/GraphicsContextAnnotation.cpp

Index: Source/core/platform/graphics/GraphicsContextAnnotation.cpp
diff --git a/Source/core/platform/graphics/GraphicsContextAnnotation.cpp b/Source/core/platform/graphics/GraphicsContextAnnotation.cpp
index 425a83d6a0722158fdeaf8bda72da91c72eb3ef7..269c090cd1004f3b1f157dbd2946b358fa9952ec 100644
--- a/Source/core/platform/graphics/GraphicsContextAnnotation.cpp
+++ b/Source/core/platform/graphics/GraphicsContextAnnotation.cpp
@@ -71,6 +71,8 @@ static const char* paintPhaseName(WebCore::PaintPhase phase)
         return "TextClip";
     case WebCore::PaintPhaseMask:
         return "Mask";
+    case WebCore::PaintPhaseBorderRadiusMask:
+        return "BorderRadiusMask";
     default:
         ASSERT_NOT_REACHED();
         return "<unknown>";