Use entities in the TypeMask interface.

pkg/compiler/lib/src/ssa/builder_kernel.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 '../closure.dart';
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/names.dart';
@@ skipping 1188 matching lines @@
     // If runtime type information is needed and the map literal has no type
     // parameters, 'constructor' is a static function that forwards the call to
     // the factory constructor without type parameters.
     assert(constructor.kind == ir.ProcedureKind.Method ||
         constructor.kind == ir.ProcedureKind.Factory);
 
     // The instruction type will always be a subtype of the mapLiteralClass, but
     // type inference might discover a more specific type, or find nothing (in
     // dart2js unit tests).
     TypeMask mapType = new TypeMask.nonNullSubtype(
-        astAdapter.getElement(astAdapter.mapLiteralClass), closedWorld);
+        astAdapter.getClass(astAdapter.mapLiteralClass), closedWorld);
     TypeMask returnTypeMask = TypeMaskFactory.inferredReturnTypeForElement(
         astAdapter.getElement(constructor), globalInferenceResults);
     TypeMask instructionType =
         mapType.intersection(returnTypeMask, closedWorld);
 
     addImplicitInstantiation(type);
     _pushStaticInvocation(constructor, inputs, instructionType);
     removeImplicitInstantiation(type);
   }
 
@@ skipping 870 matching lines @@
     push(instruction);
   }
 
   @override
   void visitConstructorInvocation(ir.ConstructorInvocation invocation) {
     ir.Constructor target = invocation.target;
     // TODO(sra): For JS-interop targets, process arguments differently.
     List<HInstruction> arguments =
         _visitArgumentsForStaticTarget(target.function, invocation.arguments);
     TypeMask typeMask = new TypeMask.nonNullExact(
-        astAdapter.getElement(target.enclosingClass), closedWorld);
+        astAdapter.getClass(target.enclosingClass), closedWorld);
     _pushStaticInvocation(target, arguments, typeMask);
   }
 
   @override
   void visitIsExpression(ir.IsExpression isExpression) {
     isExpression.operand.accept(this);
     HInstruction expression = pop();
     push(buildIsNode(isExpression, isExpression.type, expression));
   }
 
@@ skipping 368 matching lines @@
     kernelBuilder.open(exitBlock);
     enterBlock.setBlockFlow(
         new HTryBlockInformation(
             kernelBuilder.wrapStatementGraph(bodyGraph),
             exception,
             kernelBuilder.wrapStatementGraph(catchGraph),
             kernelBuilder.wrapStatementGraph(finallyGraph)),
         exitBlock);
   }
 }