Remove excessive check.

pkg/analysis_server/lib/src/services/refactoring/inline_method.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.src.refactoring.inline_method;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart' hide Element;
 import 'package:analysis_server/src/services/correction/source_range.dart';
@@ skipping 745 matching lines @@
     SourceRange nodeRange = rangeNode(node);
     if (bodyRange.covers(nodeRange)) {
       _addInstanceFieldQualifier(node);
       _addParameter(node);
       _addVariable(node);
     }
   }
 
   void _addInstanceFieldQualifier(SimpleIdentifier node) {
     PropertyAccessorElement accessor = getPropertyAccessorElement(node);
-    if (isClassFieldAccessorElement(accessor)) {
+    if (isFieldAccessorElement(accessor)) {
       AstNode qualifier = getNodeQualifier(node);
       if (qualifier == null || qualifier is ThisExpression) {
         if (accessor.isStatic) {
           String className = accessor.enclosingElement.displayName;
           if (qualifier == null) {
             SourceRange qualifierRange = rangeStartLength(node, 0);
             result.addStaticFieldQualifier(className, qualifierRange);
           }
         } else {
           SourceRange qualifierRange;
@@ skipping 28 matching lines @@
   }
 
   void _addVariable(SimpleIdentifier node) {
     VariableElement variableElement = getLocalVariableElement(node);
     if (variableElement != null) {
       SourceRange nodeRange = rangeNode(node);
       result.addVariable(variableElement, nodeRange);
     }
   }
 }