Renames to move closer to the new API

pkg/analysis_server/lib/src/services/completion/completion_manager.dart

 // Copyright (c) 2014, 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 services.completion.manager;
 
 import 'dart:async';
 
 import 'package:analysis_server/completion/completion_core.dart'
-    show CompletionRequest;
+    show CompletionRequest, CompletionResult;
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 /**
  * [CompletionCache] contains information about the prior code completion
@@ skipping 218 matching lines @@
 
   CompletionRequestImpl(this.server, this.context, this.source, this.offset);
 
   @override
   ResourceProvider get resourceProvider => server.resourceProvider;
 }
 
 /**
  * Code completion result generated by an [CompletionManager].
  */
-class CompletionResult {
+class CompletionResultImpl implements CompletionResult {
 
   /**
    * The length of the text to be replaced if the remainder of the identifier
    * containing the cursor is to be replaced when the suggestion is applied
    * (that is, the number of characters in the existing identifier).
    */
   final int replacementLength;
 
   /**
    * The offset of the start of the text to be replaced. This will be different
    * than the offset used to request the completion suggestions if there was a
    * portion of an identifier before the original offset. In particular, the
    * replacementOffset will be the offset of the beginning of said identifier.
    */
   final int replacementOffset;
 
   /**
    * The suggested completions.
    */
   final List<CompletionSuggestion> suggestions;
 
   /**
    * `true` if this is that last set of results that will be returned
    * for the indicated completion.
    */
   final bool last;
 
-  CompletionResult(this.replacementOffset, this.replacementLength,
+  CompletionResultImpl(this.replacementOffset, this.replacementLength,
       this.suggestions, this.last);
+
+  @override
+  // TODO(brianwilkerson) Figure out whether this is correct.
+  bool get hasNewSuggestions => suggestions.isNotEmpty;
+
+  @override
+  bool get isLast => last;
 }
 
 class NoOpCompletionManager extends CompletionManager {
   NoOpCompletionManager(Source source) : super(null, source);
 
   @override
   void computeSuggestions(CompletionRequest request) {
-    controller.add(new CompletionResult(request.offset, 0, [], true));
+    controller.add(new CompletionResultImpl(request.offset, 0, [], true));
   }
 }
 
 /**
  * The performance of an operation when computing code completion.
  */
 class OperationPerformance {
 
   /**
    * The name of the operation
    */
   final String name;
 
   /**
    * The elapse time or `null` if undefined.
    */
   final Duration elapsed;
 
   OperationPerformance(this.name, this.elapsed);
 }