Merge the dart:uri library into dart:core and update the Uri class

pkg/analyzer_experimental/lib/src/generated/engine.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine;
 
 import 'dart:collection' show HasNextIterator;
-import 'dart:uri' show Uri;
 import 'java_core.dart';
 import 'java_engine.dart';
 import 'instrumentation.dart';
 import 'error.dart';
 import 'source.dart';
 import 'scanner.dart' show Token, CharBufferScanner, StringScanner;
 import 'ast.dart';
 import 'parser.dart' show Parser;
 import 'sdk.dart' show DartSdk;
 import 'element.dart';
@@ skipping 2803 matching lines @@
 class RecursiveXmlVisitor_6 extends RecursiveXmlVisitor<Object> {
   final AnalysisContextImpl AnalysisContextImpl_this;
   Source htmlSource;
   List<Source> libraries;
   RecursiveXmlVisitor_6(this.AnalysisContextImpl_this, this.htmlSource, this.libraries) : super();
   Object visitXmlTagNode(XmlTagNode node) {
     if (javaStringEqualsIgnoreCase(node.tag.lexeme, AnalysisContextImpl._TAG_SCRIPT)) {
       for (XmlAttributeNode attribute in node.attributes) {
         if (javaStringEqualsIgnoreCase(attribute.name.lexeme, AnalysisContextImpl._ATTRIBUTE_SRC)) {
           try {
-            Uri uri = new Uri.fromComponents(path: attribute.text);
+            Uri uri = new Uri(path: attribute.text);
             String fileName = uri.path;
             if (AnalysisEngine.isDartFileName(fileName)) {
               Source librarySource = AnalysisContextImpl_this._sourceFactory.resolveUri(htmlSource, fileName);
               if (librarySource.exists()) {
                 libraries.add(librarySource);
               }
             }
           } catch (exception) {
             AnalysisEngine.instance.logger.logError2("Invalid URL ('${attribute.text}') in script tag in '${htmlSource.fullName}'", exception);
           }
@@ skipping 1113 matching lines @@
   }
   void logError2(String message, Exception exception) {
   }
   void logError3(Exception exception) {
   }
   void logInformation(String message) {
   }
   void logInformation2(String message, Exception exception) {
   }
 }