Rollback API change to unbreak TypeScript.

src/EditorFeatures/Core/Implementation/InlineRename/AbstractEditorInlineRenameService.InlineRenameLocationSet.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
+using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;
@@ -17,7 +18,7 @@ private class InlineRenameLocationSet : IInlineRenameLocationSet
             private readonly RenameLocations _renameLocationSet;
             private readonly SymbolInlineRenameInfo _renameInfo;
 
-            public ImmutableArray<InlineRenameLocation> Locations { get; }
+            public IList<InlineRenameLocation> Locations { get; }
 
             public InlineRenameLocationSet(SymbolInlineRenameInfo renameInfo, RenameLocations renameLocationSet)
             {

src/EditorFeatures/Core/Implementation/InlineRename/IEditorInlineRenameService.cs

@@ -111,7 +111,7 @@ internal interface IInlineRenameLocationSet
         /// has entered in the inline rename session.  These are the locations are all relative
         /// to the solution when the inline rename session began.
         /// </summary>
-        ImmutableArray<InlineRenameLocation> Locations { get; }
+        IList<InlineRenameLocation> Locations { get; }
 
         /// <summary>
         /// Returns the set of replacements and their possible resolutions if the user enters the

src/EditorFeatures/Core/Implementation/InlineRename/InlineRenameSession.cs

@@ -250,7 +250,7 @@ private void UpdateReferenceLocationsTask(Task<IInlineRenameLocationSet> allRena
             var asyncToken = _asyncListener.BeginAsyncOperation("UpdateReferencesTask");
             _allRenameLocationsTask = allRenameLocationsTask;
             allRenameLocationsTask.SafeContinueWith(
-                t => RaiseSessionSpansUpdated(t.Result.Locations),
+                t => RaiseSessionSpansUpdated(t.Result.Locations.ToImmutableArray()),
                 _cancellationTokenSource.Token,
                 TaskContinuationOptions.OnlyOnRanToCompletion,
                 ForegroundTaskScheduler).CompletesAsyncOperation(asyncToken);

src/VisualStudio/Xaml/Impl/Features/InlineRename/XamlEditorInlineRenameService.cs

@@ -140,7 +140,7 @@ public InlineRenameLocationSet(IXamlRenameInfo renameInfo, Solution solution, Im
                     Locations = locations;
                 }
 
-                public ImmutableArray<InlineRenameLocation> Locations { get; }
+                public IList<InlineRenameLocation> Locations { get; }
 
                 public bool IsReplacementTextValid(string replacementText)
                 {