Merge the Sky Engine changes from the SkyDart branch

sky/engine/core/css/RGBColor.idl

Index: sky/engine/core/css/RGBColor.idl
diff --git a/sky/engine/core/css/RGBColor.idl b/sky/engine/core/css/RGBColor.idl
deleted file mode 100644
index 19b22f16d32ae40f91daf3d2d8f53cf40674cdc7..0000000000000000000000000000000000000000
--- a/sky/engine/core/css/RGBColor.idl
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
- * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
-[
-    NotScriptWrappable,
-] interface RGBColor {
-    readonly attribute CSSPrimitiveValue  red;
-    readonly attribute CSSPrimitiveValue  green;
-    readonly attribute CSSPrimitiveValue  blue;
-};
-