Replace FindReferences with LocalReferenceFinder in ForControlVariableNotModifiedIssue.

ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/ForControlVariableNotModifiedIssue.cs

@@ -26,7 +26,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using ICSharpCode.NRefactory.CSharp.Resolver;
 using ICSharpCode.NRefactory.PatternMatching;
 using ICSharpCode.NRefactory.Semantics;
 
@@ -39,24 +38,19 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 					   IssueMarker = IssueMarker.Underline)]
 	public class ForControlVariableNotModifiedIssue : ICodeIssueProvider
 	{
-		static FindReferences refFinder = new FindReferences ();
-
 		public IEnumerable<CodeIssue> GetIssues (BaseRefactoringContext context)
 		{
-			var unit = context.RootNode as SyntaxTree;
-			if (unit == null)
-				return Enumerable.Empty<CodeIssue> ();
-
-			return new GatherVisitor (context, unit).GetIssues ();
+			return new GatherVisitor (context).GetIssues ();
 		}
 
 		class GatherVisitor : GatherVisitorBase
 		{
-			SyntaxTree unit;
-			public GatherVisitor (BaseRefactoringContext ctx, SyntaxTree unit)
+			LocalReferenceFinder referenceFinder;
+			
+			public GatherVisitor (BaseRefactoringContext ctx)
 				: base (ctx)
 			{
-				this.unit = unit;
+				this.referenceFinder = new LocalReferenceFinder(ctx);
 			}
 
 			static VariableInitializer GetControlVariable(VariableDeclarationStatement variableDecl, 
@@ -112,7 +106,7 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 					return;
 
 				var modified = false;
-				refFinder.FindLocalReferences (localResolveResult.Variable, ctx.UnresolvedFile, unit, ctx.Compilation,
+				referenceFinder.FindReferences (forStatement, localResolveResult.Variable,
 					(node, resolveResult) =>
 					{
 						if (modified)
@@ -129,7 +123,7 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 
 						var assignment = node.Parent as AssignmentExpression;
 						modified = assignment != null && assignment.Left == node;
-					}, ctx.CancellationToken);
+					});
 
 				if (!modified)
 					AddIssue (controlVariable.NameToken,