Refactor how we read global-type-inference data from ssa

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

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../compiler.dart';
 import '../constants/values.dart';
 import '../diagnostics/invariant.dart';
 import '../elements/elements.dart';
@@ skipping 82 matching lines @@
     int argumentCount = invocation.arguments.positional.length +
         invocation.arguments.named.length;
     List<String> namedArguments =
         invocation.arguments.named.map((e) => e.name).toList();
     CallStructure callStructure =
         new CallStructure(argumentCount, namedArguments);
 
     return new Selector(kind, name, callStructure);
   }
 
-  TypeMask getTypeMask(ir.MethodInvocation invocation) {
-    return _elements.getTypeMask(getNode(invocation));
+  TypeMask typeOfInvocation(ir.MethodInvocation invocation) {
+    return _compiler.globalInference.results
+        .typeOfSend(getNode(invocation), _elements);
   }
 
   TypeMask selectorTypeOf(ir.MethodInvocation invocation) {
     return TypeMaskFactory.inferredTypeForSelector(
-        getSelector(invocation), getTypeMask(invocation), _compiler);
+        getSelector(invocation), typeOfInvocation(invocation), _compiler);
   }
 
   bool isIntercepted(ir.MethodInvocation invocation) {
     return _backend.isInterceptedSelector(getSelector(invocation));
   }
 }