rename completion constants and cleanup comment

pkg/analysis_server/test/domain_completion_test.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 test.domain.completion;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/channel/channel.dart';
@@ skipping 244 matching lines @@
     completionOffset = content.indexOf('^');
     expect(completionOffset, isNot(equals(-1)), reason: 'missing ^');
     int nextOffset = content.indexOf('^', completionOffset + 1);
     expect(nextOffset, equals(-1), reason: 'too many ^');
     return super.addTestFile(
         content.substring(0, completionOffset) +
             content.substring(completionOffset + 1));
   }
 
   void assertHasResult(CompletionSuggestionKind kind, String completion,
-      [int relevance = COMPLETION_RELEVANCE_DEFAULT, bool isDeprecated = false,
+      [int relevance = DART_RELEVANCE_DEFAULT, bool isDeprecated = false,
       bool isPotential = false]) {
     var cs;
     suggestions.forEach((s) {
       if (s.completion == completion) {
         if (cs == null) {
           cs = s;
         } else {
           fail('expected exactly one $completion but found > 1');
         }
       }
@@ skipping 162 matching lines @@
   }
 
   test_keyword() {
     addTestFile('library A; cl^');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset - 2));
       expect(replacementLength, equals(2));
       assertHasResult(
           CompletionSuggestionKind.KEYWORD,
           'import',
-          COMPLETION_RELEVANCE_HIGH);
+          DART_RELEVANCE_HIGH);
       assertHasResult(
           CompletionSuggestionKind.KEYWORD,
           'class',
-          COMPLETION_RELEVANCE_HIGH);
+          DART_RELEVANCE_HIGH);
     });
   }
 
   test_local_named_constructor() {
     addTestFile('class A {A.c(); x() {new A.^}}');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset));
       expect(replacementLength, equals(0));
       assertHasResult(CompletionSuggestionKind.INVOCATION, 'c');
       assertNoResult('A');
@@ skipping 180 matching lines @@
 
   void contextsChangedRaw(ContextsChangedEvent newEvent) {
     super.contextsChanged(newEvent);
   }
 
   CompletionManager createCompletionManager(AnalysisContext context,
       Source source, SearchEngine searchEngine) {
     return new MockCompletionManager(mockContext, source, searchEngine);
   }
 }