Remove CSSCompositing

sky/engine/core/html/canvas/Canvas2DContextAttributes.cpp

Index: sky/engine/core/html/canvas/Canvas2DContextAttributes.cpp
diff --git a/sky/engine/core/html/canvas/Canvas2DContextAttributes.cpp b/sky/engine/core/html/canvas/Canvas2DContextAttributes.cpp
index c5b869590a1c049276ea4fa85bce9d5ec5d509d7..aa06ef7ae32fd9fc6255b19b957d782c18e4e71c 100644
--- a/sky/engine/core/html/canvas/Canvas2DContextAttributes.cpp
+++ b/sky/engine/core/html/canvas/Canvas2DContextAttributes.cpp
@@ -33,8 +33,7 @@
 namespace blink {
 
 Canvas2DContextAttributes::Canvas2DContextAttributes()
-    : m_alpha(true)
-    , m_storage(PersistentStorage)
+    : m_storage(PersistentStorage)
 {
 }
 
@@ -45,16 +44,6 @@ PassRefPtr<Canvas2DContextAttributes> Canvas2DContextAttributes::create()
     return adoptRef(new Canvas2DContextAttributes());
 }
 
-bool Canvas2DContextAttributes::alpha() const
-{
-    return m_alpha;
-}
-
-void Canvas2DContextAttributes::setAlpha(bool alpha)
-{
-    m_alpha = alpha;
-}
-
 String Canvas2DContextAttributes::storage() const
 {
     return m_storage == PersistentStorage ? "persistent" : "discardable";