Update the plugin API

pkg/analyzer_plugin/test/utilities/completion/completion_contributor_util.dart

 // Copyright (c) 2017, 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.
 
 import 'dart:async';
 
+import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
-import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:analyzer_plugin/src/utilities/completion/completion_core.dart';
 import 'package:analyzer_plugin/src/utilities/completion/completion_target.dart';
 import 'package:analyzer_plugin/utilities/completion/completion_core.dart';
 import 'package:analyzer_plugin/utilities/completion/relevance.dart';
 import 'package:test/test.dart';
 
 import '../../support/abstract_context.dart';
 import 'flutter_util.dart';
 
 int suggestionComparator(CompletionSuggestion s1, CompletionSuggestion s2) {
   String c1 = s1.completion.toLowerCase();
   String c2 = s2.completion.toLowerCase();
   return c1.compareTo(c2);
 }
 
 abstract class DartCompletionContributorTest extends AbstractContextTest {
   static const String _UNCHECKED = '__UNCHECKED__';
   String testFile;
   Source testSource;
   int completionOffset;
   int replacementOffset;
   int replacementLength;
   CompletionContributor contributor;
-  CompletionRequest request;
+  DartCompletionRequest request;
   List<CompletionSuggestion> suggestions;
 
   /**
    * If `true` and `null` is specified as the suggestion's expected returnType
    * then the actual suggestion is expected to have a `dynamic` returnType.
    * Newer tests return `false` so that they can distinguish between
    * `dynamic` and `null`.
    * Eventually all tests should be converted and this getter removed.
    */
   bool get isNullExpectedReturnTypeConsideredDynamic => true;
@@ skipping 402 matching lines @@
 
   /**
    * Return a [Future] that completes with the containing library information
    * after it is accessible via [context.getLibrariesContaining].
    */
   Future<Null> computeLibrariesContaining() {
     return driver.getResult(testFile).then((result) => null);
   }
 
   Future computeSuggestions() async {
-    AnalysisResult analysisResult = await driver.getResult(testFile);
-    testSource = analysisResult.unit.element.source;
-    request =
-        new CompletionRequestImpl(provider, analysisResult, completionOffset);
+    ResolveResult result = await driver.getResult(testFile);
+    testSource = result.unit.element.source;
+    request = new DartCompletionRequestImpl(provider, completionOffset, result);
 
     CompletionTarget target =
         new CompletionTarget.forOffset(request.result.unit, request.offset);
     var range = target.computeReplacementRange(request.offset);
     replacementOffset = range.offset;
     replacementLength = range.length;
 
     // Request completions
     CompletionCollectorImpl collector = new CompletionCollectorImpl();
     await contributor.computeSuggestions(request, collector);
@@ skipping 88 matching lines @@
     addSource(path, content);
   }
 
   @override
   void setUp() {
     super.setUp();
     testFile = provider.convertPath('/completionTest.dart');
     contributor = createContributor();
   }
 }