Merge the Sky Engine changes from the SkyDart branch

sky/engine/core/css/FontFace.idl

Index: sky/engine/core/css/FontFace.idl
diff --git a/sky/engine/core/css/FontFace.idl b/sky/engine/core/css/FontFace.idl
index c6714e202fe56dad2f0ccc82cb5daad4284fd189..96fbd3d7c8195d46a8cec9ea0287b4bf1299c536 100644
--- a/sky/engine/core/css/FontFace.idl
+++ b/sky/engine/core/css/FontFace.idl
@@ -39,9 +39,8 @@ enum FontFaceLoadStatus {
 
 [
     // FIXME: should be union type http://crbug.com/240176
-    Constructor(DOMString family, DOMString source, optional Dictionary descriptors),
-    Constructor(DOMString family, ArrayBuffer source, optional Dictionary descriptors),
-    Constructor(DOMString family, ArrayBufferView source, optional Dictionary descriptors),
+    // FIXME(Dictionary): descriptors
+    Constructor(DOMString family, DOMString source),
     ConstructorCallWith=ExecutionContext,
 ] interface FontFace {
 
@@ -54,7 +53,4 @@ enum FontFaceLoadStatus {
     [RaisesException=Setter, SetterCallWith=ExecutionContext] attribute DOMString featureSettings;
 
     readonly attribute FontFaceLoadStatus status;
-    [CallWith=ScriptState] readonly attribute Promise loaded;
-
-    [CallWith=ScriptState] Promise load();
 };