Move common identifiers, names and selectors to a separate library.

pkg/compiler/lib/src/elements/elements.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.
 
 library elements;
 
 import '../compiler.dart' show
     Compiler,
     isPrivateName;
 import '../constants/constructors.dart';
@@ skipping 1261 matching lines @@
 
 /// JavaScript backend specific element for the body of constructor.
 // TODO(johnniwinther): Remove this class from the element model.
 abstract class ConstructorBodyElement extends MethodElement {
   FunctionElement get constructor;
 }
 
 /// [TypeDeclarationElement] defines the common interface for class/interface
 /// declarations and typedefs.
 abstract class TypeDeclarationElement extends Element implements AstElement {
+  /// The name of this type declaration taking privacy into account.

[sigurdm, 2015/08/20 10:19:02]

 /// The name of this type variable, taking privacy into account.
(insert comma).

[Johnni Winther, 2015/08/21 11:49:22]

Done.

+  Name get memberName;
+
   /// Do not use [computeType] outside of the resolver; instead retrieve the
   /// type from the [thisType] or [rawType], depending on the use case.
   ///
   /// Trying to access a type that has not been computed in resolution is an
   /// error and calling [computeType] covers that error.
   /// This method will go away!
   @deprecated
   GenericType computeType(Compiler compiler);
 
   /**
@@ skipping 189 matching lines @@
   // TODO(kasperl): Try to get rid of these.
   void set isBreakTarget(bool value);
   void set isContinueTarget(bool value);
 
   LabelDefinition addLabel(Label label, String labelName);
 }
 
 /// The [Element] for a type variable declaration on a generic class or typedef.
 abstract class TypeVariableElement extends Element
     implements AstElement, TypedElement {
+  /// The name of this type variable taking privacy into account.

[sigurdm, 2015/08/20 10:19:02]

Same here

[Johnni Winther, 2015/08/21 11:49:22]

Done.

+  Name get memberName;
 
   /// Use [typeDeclaration] instead.
   @deprecated
   get enclosingElement;
 
   /// The class or typedef on which this type variable is defined.
   TypeDeclarationElement get typeDeclaration;
 
   /// The index of this type variable within its type declaration.
   int get index;
@@ skipping 151 matching lines @@
   bool get isDeclaredByField;
 
   /// Returns `true` if this member is abstract.
   bool get isAbstract;
 
   /// If abstract, [implementation] points to the overridden concrete member,
   /// if any. Otherwise [implementation] points to the member itself.
   Member get implementation;
 }