1 files changed, 12 insertions, 1 deletions
diff --git a/Source/WebCore/platform/graphics/ca/mac/WebTileCacheLayer.mm b/Source/WebCore/platform/graphics/ca/mac/WebTileCacheLayer.mm
index 72ae6fbd4..c6aab8aff 100644
--- a/Source/WebCore/platform/graphics/ca/mac/WebTileCacheLayer.mm
+++ b/Source/WebCore/platform/graphics/ca/mac/WebTileCacheLayer.mm
@@ -78,6 +78,16 @@ using namespace WebCore;
     _tileCache->tileCacheLayerBoundsChanged();
 }
 
+- (void)setOpaque:(BOOL)opaque
+{
+    _tileCache->setTilesOpaque(opaque);
+}
+
+- (BOOL)isOpaque
+{
+    return _tileCache->tilesAreOpaque();
+}
+
 - (void)setNeedsDisplay
 {
     _tileCache->setNeedsDisplay();
@@ -127,7 +137,8 @@ using namespace WebCore;
 
 - (void)setBorderWidth:(CGFloat)borderWidth
 {
-    _tileCache->setTileDebugBorderWidth(borderWidth);
+    // Tiles adjoin, so halve the border width.
+    _tileCache->setTileDebugBorderWidth(borderWidth / 2);
 }
 
 @end