Generate typedef node from the element.

pkg/compiler/lib/src/dart_backend/backend.dart

 // Copyright (c) 2012, 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.
 
 part of dart_backend;
 
 // TODO(ahe): This class is simply wrong.  This backend should use
 // elements when it can, not AST nodes.  Perhaps a [Map<Element,
 // TreeElements>] is what is needed.
 class ElementAst {
   final Node ast;
   final TreeElements treeElements;
 
-  ElementAst(AstElement element)
-      : this.internal(element.resolvedAst.node, element.resolvedAst.elements);
-
-  ElementAst.internal(this.ast, this.treeElements);
+  ElementAst(this.ast, this.treeElements);
 }
 
 class DartBackend extends Backend {
   final List<CompilerTask> tasks;
   final bool stripAsserts;
 
   // TODO(zarah) Maybe change this to a command-line option.
   // Right now, it is set by the tests.
   bool useMirrorHelperLibrary = false;
 
@@ skipping 147 matching lines @@
     traceGraph('Loop rewriter', treeDefinition);
     new LogicalRewriter().rewrite(treeDefinition);
     traceGraph('Logical rewriter', treeDefinition);
     new backend_ast_emitter.UnshadowParameters().unshadow(treeDefinition);
     traceGraph('Unshadow parameters', treeDefinition);
 
     TreeElementMapping treeElements = new TreeElementMapping(element);
     backend_ast.ExecutableDefinition backendAst =
         backend_ast_emitter.emit(treeDefinition);
     Node frontend_ast = backend2frontend.emit(treeElements, backendAst);
-    return new ElementAst.internal(frontend_ast, treeElements);
+    return new ElementAst(frontend_ast, treeElements);
 
   }
 
   /**
    * Tells whether we should output given element. Corelib classes like
    * Object should not be in the resulting code.
    */
   @override
   bool shouldOutput(Element element) {
     return (!element.library.isPlatformLibrary &&
             !element.isSynthesized &&
             element is! AbstractFieldElement)
         || mirrorRenamer.isMirrorHelperLibrary(element.library);
   }
 
   void assembleProgram() {
 
     ElementAst computeElementAst(AstElement element) {
       if (!compiler.irBuilder.hasIr(element)) {
-        return new ElementAst(element);
+        return new ElementAst(element.resolvedAst.node,
+                              element.resolvedAst.elements);
       } else {
         cps_ir.ExecutableDefinition definition =
             compiler.irBuilder.getIr(element);
         return createElementAst(compiler,
             compiler.tracer, constantSystem, element, definition);
       }
     }
 
     // TODO(johnniwinther): Remove the need for this method.
     void postProcessElementAst(
@@ skipping 302 matching lines @@
   }
 
   ConstantExpression compileMetadata(MetadataAnnotation metadata,
                            Node node,
                            TreeElements elements) {
     return measure(() {
       return constantCompiler.compileMetadata(metadata, node, elements);
     });
   }
 }