Stop using Element.computeNode() in refactorings and fixes.

pkg/analysis_server/lib/src/services/refactoring/inline_method.dart

Index: pkg/analysis_server/lib/src/services/refactoring/inline_method.dart
diff --git a/pkg/analysis_server/lib/src/services/refactoring/inline_method.dart b/pkg/analysis_server/lib/src/services/refactoring/inline_method.dart
index 68acb96b2046888e7b414d603b552b1326ba160f..3883df31e1d53d1b68e975bdd4774fb3e531459b 100644
--- a/pkg/analysis_server/lib/src/services/refactoring/inline_method.dart
+++ b/pkg/analysis_server/lib/src/services/refactoring/inline_method.dart
@@ -20,6 +20,7 @@ import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
+import 'package:analyzer/src/dart/element/ast_provider.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
 
@@ -196,7 +197,7 @@ Set<String> _getNamesConflictingAt(AstNode node) {
 class InlineMethodRefactoringImpl extends RefactoringImpl
     implements InlineMethodRefactoring {
   final SearchEngine searchEngine;
-  final GetResolvedUnit getResolvedUnit;
+  final AstProvider astProvider;
   final CompilationUnit unit;
   final int offset;
   _UnitCache _unitCache;
@@ -221,8 +222,8 @@ class InlineMethodRefactoringImpl extends RefactoringImpl
   Set<FunctionBody> _alreadyMadeAsync = new Set<FunctionBody>();
 
   InlineMethodRefactoringImpl(
-      this.searchEngine, this.getResolvedUnit, this.unit, this.offset) {
-    _unitCache = new _UnitCache(getResolvedUnit, unit);
+      this.searchEngine, this.astProvider, this.unit, this.offset) {
+    _unitCache = new _UnitCache(astProvider, unit);
     utils = new CorrectionUtils(unit);
   }
 
@@ -789,10 +790,10 @@ class _SourcePart {
 }
 
 class _UnitCache {
-  final GetResolvedUnit getResolvedUnit;
+  final AstProvider astProvider;
   final Map<CompilationUnitElement, CompilationUnit> map = {};
 
-  _UnitCache(this.getResolvedUnit, CompilationUnit unit) {
+  _UnitCache(this.astProvider, CompilationUnit unit) {
     map[unit.element] = unit;
   }
 
@@ -801,7 +802,7 @@ class _UnitCache {
         element.getAncestor((e) => e is CompilationUnitElement);
     CompilationUnit unit = map[unitElement];
     if (unit == null) {
-      unit = unitElement.unit;
+      unit = await astProvider.getResolvedUnitForElement(element);
       map[unitElement] = unit;
     }
     return unit;