Implement CHA through type mask and TypedSelector in the simple type inferrer.

sdk/lib/_internal/compiler/implementation/compiler.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 dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 137 matching lines @@
   void registerThrowRuntimeError() {}
   void registerAbstractClassInstantiation() {}
   void registerFallThroughError() {}
   void registerSuperNoSuchMethod() {}
   void registerConstantMap() {}
   void registerRuntimeType() {}
 
   bool isNullImplementation(ClassElement cls) {
     return cls == compiler.nullClass;
   }
+  ClassElement get intImplementation => compiler.intClass;
+  ClassElement get doubleImplementation => compiler.doubleClass;
+  ClassElement get numImplementation => compiler.numClass;
+  ClassElement get stringImplementation => compiler.stringClass;
+  ClassElement get listImplementation => compiler.listClass;
+  ClassElement get mapImplementation => compiler.mapClass;
+  ClassElement get functionImplementation => compiler.functionClass;
+  ClassElement get typeImplementation => compiler.typeClass;
+  ClassElement get boolImplementation => compiler.boolClass;
+  ClassElement get nullImplementation => compiler.nullClass;
 }
 
 /**
  * Key class used in [TokenMap] in which the hash code for a token is based
  * on the [charOffset].
  */
 class TokenKey {
   final Token token;
   TokenKey(this.token);
   int get hashCode => token.charOffset;
@@ skipping 90 matching lines @@
   ClassElement boolClass;
   ClassElement numClass;
   ClassElement intClass;
   ClassElement doubleClass;
   ClassElement stringClass;
   ClassElement functionClass;
   ClassElement nullClass;
   ClassElement listClass;
   ClassElement typeClass;
   ClassElement mapClass;
-  ClassElement mapLiteralClass;
   ClassElement jsInvocationMirrorClass;
   /// Document class from dart:mirrors.
   ClassElement documentClass;
   Element assertMethod;
   Element identicalFunction;
   Element functionApplyMethod;
   Element invokeOnMethod;
   Element createInvocationMirrorElement;
 
   Element get currentElement => _currentElement;
@@ skipping 274 matching lines @@
     objectClass = lookupCoreClass('Object');
     boolClass = lookupCoreClass('bool');
     numClass = lookupCoreClass('num');
     intClass = lookupCoreClass('int');
     doubleClass = lookupCoreClass('double');
     stringClass = lookupCoreClass('String');
     functionClass = lookupCoreClass('Function');
     listClass = lookupCoreClass('List');
     typeClass = lookupCoreClass('Type');
     mapClass = lookupCoreClass('Map');
-    // TODO: find a proper way to get to the implementation class.
-    mapLiteralClass = lookupCoreClass('LinkedHashMap');
     if (!missingCoreClasses.isEmpty) {
       internalErrorOnElement(coreLibrary,
           'dart:core library does not contain required classes: '
           '$missingCoreClasses');
     }
 
     final List missingHelperClasses = [];
     ClassElement lookupHelperClass(String name) {
       ClassElement result = jsHelperLibrary.find(new SourceString(name));
       if (result == null) {
@@ skipping 596 matching lines @@
 
   void close() {}
 
   toString() => name;
 
   /// Convenience method for getting an [api.CompilerOutputProvider].
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }