dart2js: move type-mask intermediate data from tree-elements into the global

pkg/compiler/lib/src/ssa/types.dart

Index: pkg/compiler/lib/src/ssa/types.dart
diff --git a/pkg/compiler/lib/src/ssa/types.dart b/pkg/compiler/lib/src/ssa/types.dart
index 18ed76ca5aa1d01aec330ba9fc03f05fd0ab6aa5..0df5b81ebcf290503250fcb159090203641d8e5c 100644
--- a/pkg/compiler/lib/src/ssa/types.dart
+++ b/pkg/compiler/lib/src/ssa/types.dart
@@ -14,12 +14,12 @@ import '../world.dart' show ClosedWorld;
 class TypeMaskFactory {
   static TypeMask inferredReturnTypeForElement(
       Element element, Compiler compiler) {
-    return compiler.globalInference.results.returnTypeOf(element) ??
+    return compiler.globalInference.results.resultOf(element).returnType ??
         compiler.commonMasks.dynamicType;
   }
 
   static TypeMask inferredTypeForElement(Element element, Compiler compiler) {
-    return compiler.globalInference.results.typeOf(element) ??
+    return compiler.globalInference.results.resultOf(element).type ??
         compiler.commonMasks.dynamicType;
   }