Add library mapping.

dart/lib/compiler/implementation/apiimpl.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('leg_apiimpl');
 
 #import('leg.dart', prefix: 'leg');
 #import('elements/elements.dart', prefix: 'leg');
 #import('tree/tree.dart', prefix: 'leg');
 #import('ssa/tracer.dart', prefix: 'ssa');
 // TODO(ahe): Remove dependency on frog.
 #import('../../../frog/lang.dart', prefix: 'frog');
 #import('../compiler.dart');
 #import('../../uri/uri.dart');
+#import('library_map.dart');
+
 
 class Compiler extends leg.Compiler {
   ReadUriFromString provider;
   DiagnosticHandler handler;
   Uri libraryRoot;
   List<String> options;
   bool mockableLibraryUsed = false;
 
   Compiler(this.provider, this.handler, this.libraryRoot, this.options)
-    : super.withCurrentDirectory(null, tracer: new ssa.HTracer());
+    : super(tracer: new ssa.HTracer());
 
-  leg.LibraryElement scanBuiltinLibrary(String filename) {
-    Uri uri = libraryRoot.resolve(filename);
+  leg.LibraryElement scanBuiltinLibrary(String path) {
+    Uri uri = libraryRoot.resolve(DART2JS_LIBRARY_MAP[path]);
     leg.LibraryElement library = scanner.loadLibrary(uri, null);
     return library;
   }
 
   void log(message) {
     handler(null, null, null, message, false);
   }
 
   leg.Script readScript(Uri uri, [leg.ScriptTag node]) {
     if (uri.scheme == 'dart') {
       uri = translateDartUri(uri, node);
     }
     String text = "";
     try {
       // TODO(ahe): We expect the future to be complete and call value
       // directly. In effect, we don't support truly asynchronous API.
       text = provider(uri).value;
     } catch (var exception) {
       cancel("${uri}: $exception", node: node);
     }
     frog.SourceFile sourceFile = new frog.SourceFile(uri.toString(), text);
     return new leg.Script(uri, sourceFile);
   }
 
   translateDartUri(Uri uri, leg.ScriptTag node) {
-    String uriName = uri.toString();
-    // TODO(ahe): Clean this up.
-    if (uriName == 'dart:dom') {
+    String path = DART2JS_LIBRARY_MAP[uri.path];
+    if (path === null || uri.path.startsWith('_')) {
+      reportError(node, 'library not found ${uri}');
+      return null;
+    }
+    if (uri.path == 'dom' || uri.path == 'html' || uri.path == 'io') {
+      // TODO(ahe): Get rid of mockableLibraryUsed when test.dart
+      // supports this use case better.
       mockableLibraryUsed = true;
-      return libraryRoot.resolve('../../../../lib/dom/frog/dom_frog.dart');
-    } else if (uriName == 'dart:html') {
-      mockableLibraryUsed = true;
-      return libraryRoot.resolve('../../../../lib/html/frog/html_frog.dart');
-    } else if (uriName == 'dart:json') {
-      return libraryRoot.resolve('../../../../lib/json/json.dart');
-    } else if (uriName == 'dart:isolate') {
-      return libraryRoot.resolve('../../../../lib/isolate/isolate_leg.dart');
-    } else if (uriName == 'dart:io') {
-      mockableLibraryUsed = true;
-      return libraryRoot.resolve('io.dart');
-    } else if (uriName == 'dart:utf') {
-      return libraryRoot.resolve('../../../../lib/utf/utf.dart');
-    } else if (uriName == 'dart:uri') {
-      return libraryRoot.resolve('../../../../lib/uri/uri.dart');
     }
-    reportError(node, "library not found $uriName");
+    return libraryRoot.resolve(path);
   }
 
   bool run(Uri uri) {
     bool success = super.run(uri);
     for (final task in tasks) {
       log('${task.name} took ${task.timing}msec');
     }
     return success;
   }
 
   void reportDiagnostic(leg.SourceSpan span, String message, bool fatal) {
     if (span === null) {
       handler(null, null, null, message, fatal);
     } else {
       handler(span.uri, span.begin, span.end, message, fatal);
     }
   }
 
   bool get isMockCompilation() {
     return mockableLibraryUsed
       && (options.indexOf('--allow-mock-compilation') !== -1);
   }
 }