Fix for 'Rename Local' refactoring without tasks.

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 3883df31e1d53d1b68e975bdd4774fb3e531459b..0fbbaafd683afcbe55167973fa993e9be4e40eee 100644
--- a/pkg/analysis_server/lib/src/services/refactoring/inline_method.dart
+++ b/pkg/analysis_server/lib/src/services/refactoring/inline_method.dart
@@ -200,7 +200,7 @@ class InlineMethodRefactoringImpl extends RefactoringImpl
   final AstProvider astProvider;
   final CompilationUnit unit;
   final int offset;
-  _UnitCache _unitCache;
+  ResolvedUnitCache _unitCache;
   CorrectionUtils utils;
   SourceChange change;
 
@@ -223,7 +223,7 @@ class InlineMethodRefactoringImpl extends RefactoringImpl
 
   InlineMethodRefactoringImpl(
       this.searchEngine, this.astProvider, this.unit, this.offset) {
-    _unitCache = new _UnitCache(astProvider, unit);
+    _unitCache = new ResolvedUnitCache(astProvider, unit);
     utils = new CorrectionUtils(unit);
   }
 
@@ -789,26 +789,6 @@ class _SourcePart {
   }
 }
 
-class _UnitCache {
-  final AstProvider astProvider;
-  final Map<CompilationUnitElement, CompilationUnit> map = {};
-
-  _UnitCache(this.astProvider, CompilationUnit unit) {
-    map[unit.element] = unit;
-  }
-
-  Future<CompilationUnit> getUnit(Element element) async {
-    Element unitElement =
-        element.getAncestor((e) => e is CompilationUnitElement);
-    CompilationUnit unit = map[unitElement];
-    if (unit == null) {
-      unit = await astProvider.getResolvedUnitForElement(element);
-      map[unitElement] = unit;
-    }
-    return unit;
-  }
-}
-
 /**
  * A visitor that fills [_SourcePart] with fields, parameters and variables.
  */