Revert "Reapply "Switch to the new analysis driver in analyzer_cli.""

pkg/analyzer_cli/lib/src/analyzer_impl.dart

 // Copyright (c) 2015, 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 analyzer_cli.src.analyzer_impl;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:io';
 
@@ skipping 248 matching lines @@
 
   ProcessedSeverity _processError(AnalysisError error) =>
       processError(error, options, analysisOptions);
 
   Future<LibraryElement> _resolveLibrary() async {
     PerformanceTag previous = _resolveLibraryTag.makeCurrent();
     try {
       if (analysisDriver != null) {
         String path = librarySource.fullName;
         analysisDriver.priorityFiles = [path];
-        UnitElementResult elementResult =
-            await analysisDriver.getUnitElement(path);
-        return elementResult.element.library;
+        AnalysisResult analysisResult = await analysisDriver.getResult(path);
+        return analysisResult.unit.element.library;
       } else {
         return context.computeLibraryElement(librarySource);
       }
     } finally {
       previous.makeCurrent();
     }
   }
 
   /// Compute the severity of the error; however:
   ///   * if [options.enableTypeChecks] is false, then de-escalate checked-mode
@@ skipping 102 matching lines @@
   }
 
   @override
   void logInformation(String message, [CaughtException exception]) {
     outSink.writeln(message);
     if (exception != null) {
       outSink.writeln(exception);
     }
   }
 }